OSMONICS INC
10-K, 1999-03-31
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549
                       ----------------------------------

                                   FORM 10-K

            (Mark One)
            [X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                 SECURITIES EXCHANGE ACT OF 1934 
                 For the Fiscal Year Ended December 31, 1998

                                        OR

            [ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                 THE SECURITIES EXCHANGE ACT OF 1934 
                 For the transition period from _________ to ________

            Commission File No. 1-12714

                                  OSMONICS, INC.
            (Exact name of registrant as specified in its charter)

                       MINNESOTA                            41-0955959
            (State or other jurisdiction of             (I.R.S. Employer
             incorporation or organization)              Identification No.)

                              5951 CLEARWATER DRIVE
                           MINNETONKA, MINNESOTA  55343
                     (Address of principal executive offices)
                                   (Zip Code)

                                 (612) 933-2277
                         (Registrant's telephone number)

            Securities registered pursuant to Section 12(b) of the Act:

            Common Shares, par value             New York Stock Exchange
            $0.01 per share                  (Name of each exchange on which
             (Title of each class)            registered)

            Securities registered pursuant to Section 12(g) of the Act:

                                       None.

            Indicate by check mark whether the registrant (1) has filed all
            reports required to be filed by Section 13 or 15(d) of the
            Securities Exchange Act of 1934 during the preceding 12 months
            (or for such shorter period that the registrant was required to
            file such reports), and (2) has been subject to such filing
            requirements for the past 90 days.

                              Yes  __X__     No ____

            Indicate by check mark if disclosure of delinquent filers
            pursuant to Item 405 of Regulation S-K is not contained herein,
            and will not be contained, to the best of Registrant's
            knowledge, in definitive proxy or information statements
            incorporated by reference in Part III of this Form 10-K or
            or any amendment to this form 10-K.   [X].

            As of March 17, 1999, 14,008,163 Common Shares were
            outstanding.  The aggregate market value of the Common
            Shares held by non-affiliates of the Registrant on such date
            (based upon the closing price of such shares on the New York
            Stock Exchange on March 17, 1999) was $112,065,304.


                      DOCUMENTS INCORPORATED BY REFERENCE

            Portions of the Annual Report to Shareholders for the
            fiscal year ended December 31, 1998 (the "Annual Report to
            Shareholders"), are incorporated by reference into Parts II
            and IV.  Portions of the definitive Proxy Statement for the
            Annual Meeting of Shareholders to be held on May 12, 1999
            (the "Proxy Statement"), and to be filed within 120 days
            after the Registrant's fiscal year ended December 31, 1998,
            are incorporated by reference into Part III.


                                     PART I

            ITEM 1.  BUSINESS

            The following discussion contains certain information
            and other forward-looking statements that involve a number
            of risks and uncertainties.  The actual results of Osmonics
            could differ materially from the Company's historical
            results of operations and those discussed in the forward-
            looking statements.  See "Certain Factors" and other
            portions of this Form 10-K for discussion of some of these
            risks and uncertainties.

            Osmonics, Inc., founded in 1969, and its wholly-owned
            subsidiaries (the "Company") design, manufacture and market
            a wide range of products used in the filtration, separation
            and processing of fluids.  The Company classifies its
            products into two segments, namely Consumables and Equipment.

            Filtration processes cover a broad spectrum ranging
            from those which separate discrete molecules and ions to
            those which separate particles visible to the naked eye. 
            Historically, the Company specialized in Consumables and
            Equipment utilizing crossflow filtration processes designed
            to separate particles in the molecular range.  Through
            acquisitions and internal product developments, the Company
            now manufactures a full line of filtration Consumables and
            Equipment.


            DEVELOPMENT OF BUSINESS

            In addition to developing the Company's product line
            through internal research and development, the Company has
            expanded its business through a series of acquisitions. 
            Recent primary acquisitions include: 

            AUTOTROL - In October 1993, the Company acquired Autotrol
            Corporation, founded in 1962, a manufacturer of
            controllers for water softening and filtration equipment.
            In addition, Autotrol manufactures other fluid control
            and measuring devices such as a totalizing flow meter and
            dosing system to assure proper treatment of cooling tower
            water.  Most of Autotrol's products are sold to OEM's who
            then utilize them as a component in a water conditioning
            device which is then sold to consumers. 

            LAKEWOOD INSTRUMENTS - In November 1994, the Company
            acquired substantially all of the assets of Lakewood
            Instruments, a Phoenix-based manufacturer of instruments,
            sensors and analyzers used in the measurement of fluid
            characteristics in the chemical water treatment and pure
            water industries.

            WESTERN FILTER COMPANY - In October 1995, the Company
            acquired the assets and operations of Western Filter
            Company, a supplier to the beverage and bottled water
            industry for over 50 years.  Western Filter has extensive
            experience in providing the beverage market with
            conventional water treatment technologies and membrane
            water treatment.

            DESALINATION SYSTEMS - In July 1996, the Company acquired
            Desalination Systems, Inc. ("Desal"), a manufacturer of
            crossflow filtration membrane and membrane elements that
            are marketed worldwide.  Desal, which has facilities in
            Vista, California, has products that extend the range of
            membranes and membrane elements previously offered by the
            Company.  The acquisition extended the Company's
            distribution network for such products.

            AQUAMATIC - In February 1997, the Company acquired
            AquaMatic, Inc., a Rockford, Illinois-based company
            offering a line of specialty valves and controllers for
            the water conditioning market, which are sold through the
            Company's existing distribution channels.

            PURIFICATIONS PRODUCT COMPANY - In December 1997, the
            Company acquired the assets of Purifications Products
            Company ("PPC"), a manufacturer of a line of reverse
            osmosis membrane elements and related products for
            purifying home drinking water and producing high-quality
            water for other applications.  In addition, the PPC
            division offers a line of Silt Density Index instruments
            and a line of UV sterilization products.  These products
            are sold through the Company's existing distribution
            channels.

            MICRON SEPARATIONS, INC. - In February 1998, the Company
            acquired Micron Separations, Inc. ("MSI"), a Westborough,
            Massachusetts-based developer and manufacturer of
            microfilter membrane and membrane products for diagnostic,
            laboratory and industrial use. These products expand the
            Company's range of nylon and cellulosic membrane
            applications.  The products are sold through the Company's
            existing distribution channels.

            MEMBREX CORP. - In April 1998, the Company acquired
            Membrex Corp. of Fairfield, New Jersey.  The acquisition
            gives the Company the most hydrophilic UF membrane in the
            market.  This patented membrane is primarily used to
            separate oil from water and is also used in a variety of
            applications in biotechnology, laboratory and
            petrochemical processes. Membrex also has a patented
            machine using its UF membrane which separates oil from
            aqueous chemical cleaners used in parts cleaning and other
            industrial and commercial applications.  Some Membrex
            products are sold through an exclusive agreement with
            Safety-Kleen Corp. and the remainder through the Company's
            existing distribution channels. 


            PRODUCTS

            The Company's products are divided into two primary
            categories, namely, Consumables and Equipment. 

            CONSUMABLES GROUP:

            The Company's Consumables consist primarily of
            membranes, filter media, membrane elements and filter
            cartridges.  The filtration media and membrane used in the
            Company's Consumables are produced primarily from polymers
            or polymer-based compounds; however, other Consumables
            utilize various inorganic compounds, metals and ceramics.

              MEMBRANES AND ELEMENTS:  Membranes are generally sheets
              of material which, due to their unique characteristics, can
              separate various materials from a fluid.  Membrane elements
              are the combination of membrane, support materials and
              connections which allows the membrane to be broadly
              utilized.

              Membrane elements are typically replaced every 6 to 60
              months, depending upon the severity of the application.  The
              Company manufactures the membrane material and membrane
              elements used in its own systems, and also manufactures
              membrane and membrane elements for other original equipment
              manufacturers (OEM's) who include them as component parts in
              their products.

              The Company's membranes are used in many bioengineering
              processes such as the production of high fructose corn
              sugar, enzyme purification, and purification of
              pharmaceuticals produced by biological processes.  Other
              uses include water purification applications in
              hemodialysis, semiconductor manufacturing, production of
              pure water for beverages, production of ultrapure
              pharmaceutical and boiler feed water, industrial water
              purification and waste removal for pollution control
              compliance.

              In addition, the Company sells its home reverse osmosis
              (HRO) membrane elements to OEM's who package them into
              systems for use in homes, offices and retail vending
              establishments to produce purified drinking water.  The
              Company is registered with the United States Food and Drug
              Administration for the manufacture and sale of certain
              membrane elements used in biological preparations.  The
              Company is also registered with the U.S. FDA for the
              manufacture of Class II medical devices used to purify water
              for hemodialysis. 

              The Company markets its microfiltration normal flow
              membrane for use in a variety of laboratory and medical
              diagnostic applications.  Numerous applications exist for
              the Company's microfilters because of unique features,
              including use in diagnostics, air monitoring and in
              laboratory procedures for cancer and other research.

              FILTER CARTRIDGES:  The Company markets several types
              of replaceable cartridge filters.  Cartridge filters consist
              of the various membranes and filtration media manufactured
              by the Company and third parties together with various end
              caps and other parts that allow them to be used and replaced
              in filtration equipment and systems.  These cartridge
              filters include depth cartridge filters, pleated cartridge
              filters, and rolled cartridge filters. 

              Cartridge filters are manufactured in a range of pore
              sizes and particulate retention ratings.  Cartridge filters
              are designed to retain particles in the filters.  As a
              result, cartridge filters are typically replaced at
              intervals of eight hours to four weeks, depending on the
              particular application.

              The Company's ceramic cartridge filters are marketed
              for use in microfiltration and particulate filtration. 
              Ceramic cartridge filters are used to sterilize
              pharmaceutical solutions and are used in laboratory
              applications, where many analytic and diagnostic procedures
              require purification or sterilization.

              The Company also markets separation elements and
              equipment used in coalescing filtration.  Applications of
              coalescing filtration include removal of contaminants from
              compressed air and gas lines, dewatering of solvents and jet
              fuel, and removal of trace oil from waste water prior to
              disposal.

            EQUIPMENT GROUP:

            The Company manufactures a broad range of equipment
            products ranging from large independent fluid treatment
            systems custom designed for a particular customer and its
            related filtration requirements to instruments used to
            determine the amount of a particular substance in a fluid. 
            The Company's filtration equipment utilizes a wide range of
            filtration techniques including:  crossflow filtration
            (which includes reverse osmosis, nanofiltration,
            ultrafiltration and microfiltration), normal filtration
            (which includes microfiltration and particle filtration),
            coalescing filtration, ion exchange, clarification,
            chromatography, ozonation and distillation.  As a result,
            the Company's Equipment is used in a broad range of
            applications from complete fluid processing systems used in
            beverage production to sensors for detecting the presence of
            various levels of materials.  The Company's Equipment
            products are divided into three categories:  Equipment and
            Pumps, Fluid Controls and Valves, and Systems.  The
            Company's Equipment products are manufactured in multiple
            locations throughout the United States. 

              EQUIPMENT AND PUMPS:

              To provide a complete line of products for the
              production of pure water, the Company manufactures
              distillation equipment, both single-effect and more energy
              efficient multi-effect.  The Company's distillation product
              lines range from laboratory stills to elaborate 5000-gallon-
              per-hour multi-stage purifiers. The Company markets
              distillation and related water purification equipment used
              primarily in the laboratory and pharmaceutical industries.

              The Company markets equipment to generate ozone from
              electricity using corona discharge.  Ozone is becoming
              increasingly important as a bactericide and water purifier
              because it kills bacteria, virus and giardia cysts 10 to
              300 times faster than chlorine.  Ozone is also effective in
              oxidizing trace organic materials in water which are
              precursors of the carcinogenic trihalomethanes.  Ozone can
              also be used to purify solvent-contaminated groundwater and
              is often used to de-color water and wastewater.

              In 1997, the Company announced a partnership with Fuji
              Electric Co., Ltd., Japan and Fuji Electric Corp. of America
              (Fuji) to manufacture high concentration ozone generators
              using proprietary Fuji technology and components.  This
              partnership will provide the Company a strong entry into the
              municipal water treatment market, as well as pulp and paper
              and other large-scale oxidation applications.  As part of
              the agreement, the Company has the rights to manufacture and
              sell such equipment world-wide except for Japan and Korea.

              Other types of equipment manufactured by the Company
              include centrifugal, diaphragm, and bellows pumps;
              electronic controllers to operate precision valves for water
              conditioning; flow control and measuring devices and
              instrumentation; and housings and specialty holders and
              devices for containing and retaining various membranes and
              filters.

              The Company markets a line of multi-stage centrifugal
              pumps.  These pumps were developed by the Company to meet
              the need for dependable high pressure pumps and are
              available in 60 standard sizes with flows ranging from 3
              gallons per minute to 500 gallons per minute and pressure
              capabilities from 25 pounds per square inch (psi) to
              500 psi.  The pumps are capable of operating in series to
              obtain 1000 psi for seawater desalting and other high
              pressure applications.

                CONTROLS AND VALVES:

                The Company is a leader in the manufacture of the
                controllers and valves used to effect ion exchange
                technology.  The most used ion exchange process is for water
                softening where the ions of calcium and magnesium are
                replaced with sodium to reduce soap usage, improve boiler
                operation and improve cleaning.  Another ion exchange
                application is to polish ultrapure water for electronics
                manufacture and high-pressure boiler feed. 

                The Company markets totalizing flow meters and
                electronic controllers made of corrosion resistant Noryl
                plastic, as well as a line of Teflon PTFE fluid control
                products including valves, fittings and flow meters used in
                the electronics, pharmaceutical and chemical industries.

                The Company markets both analog and digital products
                for chemical water treatment and monitoring.  The
                instruments are used to measure and control conductivity,
                pH, ORP, chlorine, specific ions, trihalomethanes (THM's)
                and solvents in water, such as trichloroethylene.  The
                instruments are capable of being used in local operating
                network (LON) communications and data acquisition.

                CUSTOM EQUIPMENT AND SYSTEMS:

                The Company also manufacturers crossflow and normal
                filtration machines.  Such machines are comprised of one or
                more membrane elements, cartridge filters, pumps, valves,
                controls, transformers, heat exchangers, pipes and a steel
                frame on which the components are mounted.  The size and
                number of membrane elements and filters can vary greatly. 
                Pumps, pipes and frames of various sizes can be combined and
                configured to accommodate the membrane elements or filters
                required for various fluid handling or separation tasks.

                The systems sold by the Company are comprised of one or
                more machines or pieces of equipment designed and
                manufactured by the Company as well as ancillary equipment,
                such as additional pumps, heat exchangers and holding tanks.
                The type, size and number of machines and the ancillary
                equipment included in a system will vary with the nature and
                size of the fluid separation task. 


            REPLACEABLE AND EQUIPMENT SALES

            The following table shows the percentage of net sales
            during the past five years attributable to the Company's
            fluid processing and handling equipment compared to its
            replaceable components:

                      Year Ended                   Replaceable
                      December 31    Equipment     Components
                      -----------    ---------     -----------
                         1998           48%            52%
                         1997           46%            54%
                         1996           49%            51%
                         1995           48%            52%
                         1994           51%            49%
                         1993           49%            51%

            As a result of a Company-wide reorganization on July 1, 1998
            and to meet new SEC reporting requirements, the above sales
            comparison will no longer be reported.  Instead, business
            results will be reported based on the two segments previously
            discussed (Consumables and Equipment).

            For the last six months of 1998, the Consumables Group
            was 41% of total sales and the Equipment Group made up 59%
            of sales.  Although we will discontinue our previous method
            of reporting, it is still our goal to have an equal balance
            of replaceable sales to equipment sales.


            SALES AND MARKETING

            As a result of our broad range of Equipment and
            Consumables, the Company's Equipment and Consumables are
            used in the purification of water and industrial solutions,
            dewatering and recycling of commercial and industrial
            fluids, pollution control and seawater desalting.  The
            Company's principal domestic and international markets, from
            which it derives more than 50% of its sales, include the
            potable water, health care, biotechnology, food and
            beverage, electronics, chemical processing and power
            generation industries.   

            The Company focuses the marketing of its products through
            four selling groups:

               1.  Custom equipment and systems.

               2.  Components and product sales.

               3.  Catalog and telephone sales.

               4.  International

            These sales groups are supported by application engineers
            and market support personnel. 

            The Company markets its custom machines and systems
            through its direct sales force.  The Company's standard
            products are marketed to a network of independent
            distributors with the help of Company district managers. 
            These distributors provide world-wide installation service
            and stocking of a wide range of the Company's standard
            products.  Some sales are made directly to certain of the
            Company's largest customers and to other manufacturers of
            filtration equipment and systems.

            The Company's marketing activities include appearances
            at trade shows, direct mail campaigns, advertisements in
            professional and trade journals and appearances before
            professional organizations.  The Company participates with
            its customers in planning the systems in which its products
            are to be used, particularly if new applications are
            involved.  In some cases, the sale of a system designed for
            a particular customer may result from an engineering and
            service relationship which has extended over several years.


            RESEARCH AND DEVELOPMENT

            Research and development activities emphasize product
            development and applied research, with the goal of
            developing proprietary products.  Such expenditures totaled
            $9,913,000 in 1998, $10,635,000 in 1997, and $10,937,000 in
            1996.


            PATENTS AND TRADEMARKS

            The Company has been granted domestic and certain
            foreign trademarks on numerous product names, and on its
            logo-types.  The Company holds domestic and foreign patents
            on certain of its filter media, filters, controlling valves,
            machine designs and other products.  Although the Company
            believes that its patents have value, the Company's business
            is not dependent on any patent or group of related patents.
            The Company considers its technological position to be
            based primarily on its proprietary manufacturing methods,
            innovative engineering and marketing expertise.


            EMPLOYEES

            As of December 31, 1998, the Company employed 1,360 persons
            including 213 holding engineering or technical degrees.


            COMPETITION

            The Company experiences competition from a variety of
            sources with respect to virtually all of its products,
            although the Company knows of no single entity that competes
            with it across the full range of its products and systems. 
            Competition in the markets served by the Company is based on
            a number of factors, which may include price, technology,
            applications experience, know-how, availability of
            financing, reputation, product warranties, reliability,
            service and distribution.

            With respect to the Company's membrane and related
            water treatment equipment business activity, there are a
            number of companies, including several sizable chemical
            companies, that manufacture membranes, but not equipment. 
            There are numerous smaller companies, primarily fabricators,
            that build water treatment and desalination equipment, but
            which generally do not have their own proprietary membrane
            technology.  A limited number of companies manufacture both
            membranes and equipment.  In ozone and distillation
            equipment, there are both large and small competitors with
            no single dominant competitor.  In water softener controls
            and valves, the Company has three primary and numerous
            secondary competitors.  Some competitors sell only
            controller valves and some sell complete softeners.  The
            Company has numerous competitors in its conventional water
            treatment and filtration products business activities. 

            With respect to the Company's disposable filter and lab
            products, two companies, Pall and Millipore, dominate the
            industry with several smaller companies competing in
            selected product lines. 

            With respect to the Company's pump and fluid handling
            products, there are numerous competitors of larger size and
            with greater resources than the Company.  Some competitors
            have significantly broader product lines than the Company. 

            The Company is unable to state with certainty its
            relative market position in all aspects of its business.
            Many of its competitors have financial and other resources
            greater than those of the Company.


            RAW MATERIALS

            The principal raw materials used by the Company are
            various plastic materials including polyvinyl chloride,
            polypropylene, Noryl PPO, Nylon cellulose acetate,
            polycarbonate, polyester, polysulfone, and PTFE; ceramic and
            glass materials, stainless steel, steel, brass, copper,
            titanium, silver and various other synthetic materials, all
            of which are normally available from sources within the
            continental United States.  Most raw materials used by the
            Company are available from multiple sources of supply.  A
            limited number of materials are proprietary products of
            major chemical companies which, if not available, would have
            a material effect on the Company's sales and profits.  The
            Company believes it could find substitutes for these
            materials if they should become unavailable, but has no
            assurance that the substitute would perform as well or be
            priced as favorably.

            To date, the Company has experienced no difficulty in
            securing any of its needed raw materials and components.


            CUSTOMERS

            No one customer accounted for 10 percent or more of the
            Company's consolidated revenue in 1998, 1997, or 1996.


            BACKLOG

            The dollar amount of the Company's backlog of orders
            considered to be firm at December 31, 1998, was $21.6
            million.  The comparable backlog at December 31, 1997, was
            $28.2 million.  The Company expects that nearly all orders
            included in the backlog at December 31, 1998, will be filled
            during the 1999 fiscal year.  The Company does not believe
            that its backlog at any time is necessarily indicative of
            annual sales.  The business of the Company is not subject to
            significant seasonal variations. 


            GOVERNMENTAL REGULATION

            Certain applications of the Company's reverse osmosis
            and ultrafiltration products and distillation equipment are
            subject to governmental regulation.  Products used for
            fractionation of cheese whey for human consumption are
            subject to regulation by the United States Department of
            Agriculture.  Reverse osmosis, ultrafiltration and
            distillation systems used in medical applications,
            particularly the systems used in artificial kidney dialysis
            equipment and pharmaceutical water for injection, are
            subject to regulation by the United States Food and Drug
            Administration.  Ultrafiltration and microfiltration
            products used for biological separations are subject to
            regulation by the United States Food and Drug
            Administration.

            To date, compliance with federal, state and local
            provisions relating to the protection of the environment has
            had no material effect upon the capital expenditures,
            earnings or competitive position of the Company.


            FOREIGN OPERATIONS

            Substantially all of the Company's operations and
            assets are located in the United States.  The Company has
            sales offices and distribution facilities in France,
            Thailand, Switzerland, Germany, Hong Kong, Japan, Singapore
            and China.  Limited assembly is conducted in Europe and
            Asia.  The profitability of domestic and foreign sales is
            substantially equal.  Sales to Canada are made on the same
            trade terms as are available to U.S. customers.

            Large export sales are primarily made on the basis of
            confirmed irrevocable letters of credit or time drafts to
            selected customers in U.S. dollars.  Therefore, the Company
            believes that currency fluctuation or political and economic
            instability do not constitute substantial risks.  See Note
            13 of Notes to Consolidated Financial Statements for a
            breakdown of the Company's foreign operations and export
            sales by geographic area.


            CERTAIN FACTORS

            In addition to the factors discussed elsewhere in the
            Company's Annual Report to Shareholders or this Form 10-K,
            such as intellectual property and other technological risks,
            regulatory risks, environmental risks and Year 2000 risks,
            the following are some important factors that could cause
            actual results or events to differ materially from those
            contained in any forward-looking statements made by or on
            behalf of the Company. 

              EARNINGS VARIATIONS:

              The sale of capital equipment within the water
              purification and fluid filtration industry is cyclical and
              influenced by various economic factors including interest
              rates and general fluctuations of the business cycle.  A
              significant portion of the Company's revenues are derived
              from capital equipment sales.  While the Company sells
              capital equipment to customers in diverse industries and in
              global markets, cyclicality of capital equipment sales and
              instability of general economic conditions, including those
              in Asia and Latin America and certain other markets, could
              have a material adverse effect on the Company's revenues and
              profitability. 

              Operating results from the sale of water purification
              and fluid filtration industry also can be expected to
              fluctuate significantly as a result of the limited pool of
              existing and potential customers for these systems, the
              timing of new contracts, possible deferrals or cancellations
              of existing contracts and the evolving and unpredictable
              nature of the markets for water purification systems.  As a
              result of these and other factors, the Company's operating
              results may be subject to quarterly or annual fluctuations.
              There can be no assurance that at any given time the
              Company's operating results will meet or exceed stock market
              analysts' expectations.

              COMPETITION:

              All of the markets in which the Company competes are
              highly competitive, and most are fragmented, with numerous
              regional and local participants.  There are competitors of
              the Company in certain markets that are divisions or
              subsidiaries of companies that have significantly greater
              resources than the Company.  Competitive factors include
              price, technical expertise, product quality and
              responsiveness to customer needs, including service and
              technical support.  The Company competes not only with a
              large number of independent wholesalers and with other
              distribution chains similar to the Company, but also with
              manufacturers who sell directly to customers.  The Company's
              HRO business also competes with companies with national
              distribution networks, businesses with regional scope, and
              local product assemblers or service companies, as well as
              retail outlets.  The Company believes that there are
              thousands of participants in the residential water business.
              The HRO business competes principally on the basis of
              price, product quality and "taste," service, distribution
              capabilities, geographic presence and reputation. 
              Competitive pressures, including those described above, and
              other factors could cause the Company to lose market share
              or could result in significant price erosion, either of
              which could have a material adverse effect upon the
              Company's financial position, results of operations and cash
              flows.

              RISKS RELATED TO ACQUISITIONS:

              The Company has, since 1987, acquired a number of
              United States-based companies and product lines.  The
              Company plans to continue to consider and potentially pursue
              acquisitions that expand the segments of the water and
              wastewater treatment and water-related industries in which
              it participates, complement its technologies, products or
              services, broaden its customer base and geographic areas
              served and/or expand its global distribution network, as
              well as acquisitions which provide opportunities.  The
              Company's acquisition strategy entails the potential risks
              inherent in assessing the value, strengths, weaknesses,
              contingent or other liabilities and potential profitability
              of acquisition candidates and in integrating the operations
              of acquired companies.  Although the Company believes that
              it has generally been successful in pursuing acquisitions,
              there can be no assurance that acquisition opportunities
              will continue to be available, that the Company will have
              access to the capital required to finance potential
              acquisitions, that the Company will continue to acquire
              businesses or that any business acquired will be integrated
              successfully or prove profitable.

              PROFIT UNCERTAINTY IN FIXED-PRICE CONTRACTS:

              A significant portion of the Company's revenues are
              generated under fixed price contracts.  To the extent that
              original cost estimates are inaccurate, scheduled deliveries
              are delayed or progress under a contract is otherwise
              impeded, revenue recognition and profitability from a
              particular contract may be adversely affected.

              RISKS OF DOING BUSINESS IN OTHER COUNTRIES:

              The Company sells a significant amount of its product
              in markets outside the United States.  While these
              activities may provide important opportunities for the
              Company to offer its products and services internationally,
              they also entail the risks associated with conducting
              business internationally, including the risk of currency
              fluctuations, slower payment of invoices, the lack in some
              jurisdictions of well-developed legal systems,
              nationalization and possible social, political and economic
              instability.


            ITEM 2.  PROPERTIES

            The executive offices and principal manufacturing facilities
            of the Company are located in Minnetonka, Minnesota, a
            suburb of Minneapolis.

            A summary of the Company's main operating facilities is
            as follows:


            LOCATION         STATUS       SIZE       FUNCTION
            --------         ------       ----       --------   
            Minnetonka, MN   Owned    309,600 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Vista, CA        Owned    110,000 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Milwaukee, WI    Owned    103,700 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Rockford, IL     Owned     58,400 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Phoenix, AZ      Owned     57,600 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Syracuse, NY     Owned     48,500 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Westborough, MA  Leased    46,800 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Rockland, MA     Leased    38,200 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Fairfield, NJ    Leased    23,800 sq ft  Research & Development

            Upland, CA       Leased    22,000 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Denver, CO       Owned     20,700 sq ft  Warehouse

            Escondido, CA    Leased    20,000 sq ft  Manufacturing

            Ft. Lauderdale,  Leased    20,000 sq ft  Sales, Warehouse

            Le Mee, France   Owned     18,300 sq ft  Sales, Manufacturing,
                                                     Warehouse

            Emmetsburg, IA   Leased     8,800 sq ft  Manufacturing, Warehouse

            Bryan, TX        Owned      2,500 sq ft  Manufacturing, Warehouse

            Total Owned               729,300 sq ft

            Total Leased              179,600 sq ft

            Total Owned and Leased    908,900 sq ft

            Certain borrowings of the Company are collateralized by
            real property of the Company.

            The current manufacturing facilities are adequate for
            intermediate-term operations.  In addition, the Company
            leases space in Thailand, China, Germany, Japan, Hong Kong,
            Switzerland and Singapore that is used primarily for sales
            activities. 


            ITEM 3.  LEGAL PROCEEDINGS

            The Company is currently involved in several lawsuits
            incidental to its business. Management does not believe that
            any of the lawsuits will have a material adverse effect on
            the Company's financial position or results of operations.


            ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

            No matter was submitted to a vote of the Company's
            security holders during the fourth quarter of the fiscal
            year that ended December 31, 1998. 

                         EXECUTIVE OFFICERS OF THE REGISTRANT

                                                                      OFFICER
               NAME AND AGE             POSITION WITH COMPANY          SINCE
            --------------------       -----------------------        -------
            D. Dean Spatz (54)         Chief Executive Officer         1969
                                       and Chairman of the Board

            Ruth Carol Spatz (54)      Secretary                       1969

            Howard W. Dicke (61)       Vice President Human Resource   1978
                                       and Corporate Development,
                                       and Treasurer

            L. Lee Runzheimer (56)     Chief Financial Officer         1988

            Roger S. Miller (40)       Sr. Vice President Corporate    1998
                                       Sales & Marketing

            Kenneth E. Jondahl (42)    Vice President Commercial       1991
                                       Development

            Andrew T. Rensink (42)     Vice President Quality and
                                       Regulatory Affairs              1991

            Phillip M. Rolchigo (37)   Vice President Research &       1998
                                       Development

            Kenton C. Toomey (51)      Executive Vice President        1997
                                       Operations

            Bjarne N. Nicolaisen (55)  Vice President International    1998
            

            All of the executive officers have been officers of the
            Company for more than five years except the following: 

            Mr. Miller joined Osmonics in 1993 as a product manager
            for pumps.  Previously, Mr. Miller managed sales and
            marketing for a machine tool manufacturer and for a capital
            equipment manufacturer in the water treatment industry. 

            Mr. Nicolaisen came to Osmonics with the merger with
            Desalination Systems, Inc. in 1996.  Mr. Nicolaisen began
            his career as a chemical engineer and regional sales manager
            for Radiometer A/S in Denmark.  He then joined DDS Group as
            a sales manager in the reverse osmosis division, eventually
            moving to the U.S. as sales director for dairy equipment in
            1980. Mr. Nicolaisen became vice president of sales and
            marketing for Desalination Systems in 1987. 

            Dr. Rolchigo came to Osmonics from Membrex Corp., which
            Osmonics acquired in 1998.  Dr. Rolchigo is the principal
            inventor of advanced vortex flow filtration technology.  His
            technical expertise spans diverse industries from
            environmental waste to pharmaceutical processing.  He has
            served as a research affiliate in chemical engineering for
            MIT, and belongs to numerous industry organizations.  

            Mr. Toomey joined Osmonics in April of 1997 as Vice
            President Operations.  Prior to that he had been the Vice
            President of Operations for DeZurik, a unit of General
            Signal.  Previously, throughout his 26 years with 3M
            Company, Mr. Toomey held numerous director and management
            positions in several 3M business units including plant
            manager of the Dental Products Division. 

            All executive officers are elected annually by, and
            serve at the direction of, the Board of Directors.  D. Dean
            Spatz and Ruth Carol Spatz are husband and wife.


                                     PART II

            ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON EQUITY AND
                     RELATED SHAREHOLDER MATTERS

            "Common Stock Data," and "Notes to Consolidated
            Financial Statements," pages 16-21 of the Annual Report to
            Shareholders, are incorporated herein by reference.  As of
            March 17, 1999 there were 2,313 shareholders of record.

            The Company has not paid cash dividends on its common
            shares.  The Board of Directors currently intends to retain
            its earnings for the expansion of the Company's business.
            The Company has issued promissory notes which contain a
            covenant limiting the payment of dividends to shareholders.
            At December 31, 1998, approximately $5,000,000 of retained
            earnings was restricted under this covenant. 


            ITEM 6.  SELECTED FINANCIAL DATA

            "Selected Financial Data," page 29 of the Annual Report
            to Shareholders, is incorporated herein by reference.


            ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                     CONDITION AND RESULTS OF OPERATIONS

            "Management's Discussion and Analysis of Financial
            Condition and Results of Operations," pages 22-25 of the
            Annual Report to Shareholders, is incorporated herein by
            reference. 


            ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

            The following consolidated financial information of the
            Registrant and its subsidiaries, included in the Annual
            Report to Shareholders, is incorporated herein by reference:

                                                                Page(s)
                                                                -------
                Consolidated Statements of Income . . . . . . . .  12

                Consolidated Balance Sheets  . . . . . . . . . . . 13

                Consolidated Statements of Cash Flows  . . . . . . 14

                Consolidated Statements of Changes in
                      Shareholders' Equity  . . . . . . . . . . .  15

                Notes to Consolidated Financial Statements . .  16-21

                Independent Auditors' Report   . . . . . . . . . . 25

                Quarterly Income Data  . . . . . . . . . . . . . . 26


                                     PART III

            ITEM 10.  DIRECTORS

            The information required by this item is incorporated
            herein by reference to the definitive Proxy Statement to be
            filed with the Securities and Exchange Commission within 120
            days after the close of the Company's fiscal year ended
            December 31, 1998 and forwarded to stockholders prior to the
            Company's 1999 Annual Meeting of Stockholder (the "1999
            Proxy Statement").


            ITEM 11.  EXECUTIVE COMPENSATION

            The information required by this Item is incorporated
            herein by reference to the 1999 Proxy Statement.


            ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
                      AND MANAGEMENT

            The information required by this Item is incorporated
            herein by reference to the 1999 Proxy Statement.


            ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

            The information required by this Item is incorporated
            herein by reference to the 1999 Proxy Statement. 


                                     PART IV

            ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULE, AND
                      REPORTS ON FORM 8-K

                   (a) (1)  Financial Statements

                            The consolidated financial statements of the
                            Registrant and its subsidiaries, included in
                            the Annual Report to Shareholders, are
                            incorporated by reference in Item 8, and are
                            also incorporated herein by reference.

                   (a) (2)  Financial Statement Schedule

                            Reports of Independent Public Accountants on
                            Supplemental Schedule to the Consolidated
                            Financial Statements.

                            Valuation and qualifying accounts.

                            Schedules not listed above have been omitted
                            because they are either not applicable, not
                            material or the required information has
                            been given in the financial statements or in
                            the notes to the financial statements.

                       (2)  Agreement and Plan of Merger among
                            Desalination Systems, Inc., Osmonics, Inc.
                            and DSI Acquisition Corp. dated
                            May 17, 1996.  (Incorporated herein by
                            reference to Exhibit 2 to Registration
                            Statement on Form S-3, File No. 33-05029.)

                           (3)A. Certificate of Incorporation of the
                                 Registrant, as amended.  (Incorporated
                                 herein by reference to Exhibit 3.1 to
                                 Registration Statement on Form S-2,
                                 File No. 33-336.)  Certificate of
                                 Amendment.  (Incorporated herein by
                                 reference to Exhibit (3)A on Form 10-K
                                 for fiscal year ended December 31, 1987,
                                 File No. 0-8282.)

                              B. By-Laws of the Registrant. 
                                 (Incorporated herein by reference to
                                 Exhibit 3.2 to Registration Statement
                                 on Form S-2, File No. 33-336.)

                           (4)A. Note Purchase Agreement dated July 12,
                                 1991. (Incorporated herein by
                                 reference to Annual Report on Form 10-K
                                 for fiscal year ended December 31, 1991.)

                          (10)A.* 1993 Stock Option Plan and related
                                  form of stock option agreement. 
                                  (Incorporated herein by reference to
                                  Annex C of the Registrant's Joint
                                  Proxy Statement/Prospectus dated
                                  September 10, 1993.)

                              B.  Stock Option Agreement with Michael L.
                                  Snow, Director.  (Incorporated herein
                                  by reference to Annual Report on Form
                                  10-K for fiscal year ended
                                  December 31, 1993.)

                              D.  1995 Employee Stock Purchase Plan. 
                                  (Incorporated herein by reference to
                                  the Registrant's Proxy Statement dated
                                  March 27, 1995.)

                              E.* 1995 Director Stock Option Plan. 
                                  (Incorporated herein by reference to
                                  the Registrant's Proxy Statement dated
                                  March 27, 1995.)

                                  * Denotes Executive Compensation Plan.

                            (13)  1998 Annual Report to Shareholders. 
                                  (Only those portions incorporated
                                  herein by reference shall be deemed
                                  filed with the Commission.)

                            (21)  Subsidiaries of the Registrant.

                            (23)  Consent of Deloitte & Touche LLP.

                       (b)  Reports on Form 8-K

                            No reports on Form 8-K were filed during the
                            quarter ended December 31, 1998.


                                     SIGNATURES

            Pursuant to the requirements of Section 13 or 15(d) of
            the Securities Exchange Act of 1934, the registrant has duly
            caused this report to be signed on its behalf by the
            undersigned, thereunto duly authorized.

                                                OSMONICS, INC.

                                                By  /s/ D. Dean Spatz  
                                                ------------------------
                                                D. Dean Spatz, President

            Dated:  March 30, 1999


            Pursuant to the requirements of the Securities Exchange
            Act of 1934, this report has been signed below by the
            following persons on behalf of the registrant and in the
            capacities and on the dates indicated:

                 Signatures                 Title                 Date
            --------------------   ----------------------    --------------

            /s/L. Lee Runzheimer   Chief Financial           March 30, 1999
               L. Lee Runzheimer   Officer
                                   (Principal Finance and
                                   Accounting Officer)

            /s/Howard W. Dicke     Vice President Human      March 30, 1999
               Howard W. Dicke     Resources and
                                   Corporate Development,
                                   and Treasurer

            /s/Ruth Carol Spatz    Director                  March 30, 1999
               Ruth Carol Spatz

            /s/Michael L. Snow     Director                  March 30, 1999
               Michael L. Snow

            /s/Ralph E. Crump      Director                  March 30, 1999
               Ralph E. Crump

            /s/Verity C. Smith     Director                  March 30, 1999
               Verity C. Smith

            /s/Charles W. Palmer   Director                  March 30, 1999
               Charles W. Palmer

            /s/William Eykamp      Director                  March 30, 1999
               William Eykamp

            /s/D. Dean Spatz       President, Chairman of    March 30, 1999
               D. Dean Spatz       the Board and Director
                                   (Principal Executive
                                   Officer)





                                   OSMONICS, INC.
                        CONSOLIDATED STATEMENTS OF OPERATIONS
                          (In thousands, except share data)


                                              Year ended December 31,
                                            1998      1997       1996
                                          --------  --------   --------
            Sales                         $177,819  $164,905   $155,946

            Cost of sales                  114,718    99,860     92,523

            Gross profit                    63,101    65,045     63,423

            Operating expenses:
              Selling, general and
              administrative                43,487    39,603     35,079
              Research, development and
              engineering                    9,913    10,635     10,937
              Special charges                7,988     1,448        -
                                            61,388    51,686     46,016
            Income from operations           1,713    13,359     17,407

            Other income (expense), net:
              Interest income                  668       913      1,023
              Interest expense              (4,288)   (2,226)    (1,594)
              Other                            829       344      3,072

                                            (2,791)     (969)     2,501
            Income (loss) from
            continuing operations
            before income taxes             (1,078)   12,390     19,908

            Income taxes (benefit)
            (Note 11)                          (25)    3,927      6,441

            Income (loss) from
            continuing operations           (1,053)    8,463     13,467

            Recovery on discontinued
            operations
            (less income tax of $617)          -       1,330        -

            Net income (loss)              $(1,053)  $ 9,793   $ 13,467

            Earnings (loss) per share -
            basic (Note 16)
              Income (loss) from
              continuing operations         $(0.08)    $0.60      $0.95
              Net income (loss)             $(0.08)    $0.70      $0.95

            Earnings (loss) per share -
            assuming dilution (Note 16)
              Income (loss) from
              continuing operations         $(0.08)    $0.59      $0.93
              Net income (loss)             $(0.08)    $0.68      $0.93

            The accompanying notes are an integral part of the
            consolidated financial statements.


                                  OSMONICS, INC.
                            CONSOLIDATED BALANCE SHEETS
                          (In thousands, except share data)


                                                         December 31,
                                                       1998        1997
                                                      -------     -------
            ASSETS
            Current assets:
             Cash and cash equivalents                $   576      $4,872
             Marketable securities (Note 3)            14,271      17,004
             Trade accounts receivable, net of
              allowance for doubtful accounts of
              $1,057 in 1998 and $888 in 1997          34,767      28,969
             Inventories (Note 4)                      28,123      35,228
             Deferred tax assets (Note 12)              6,610       1,413
             Other current assets                       5,034       1,639
               Total current assets                    89,381      89,125
             Property and equipment, at cost:
              Land and land improvements                5,606       5,535
              Buildings                                30,568      29,278
              Machinery and equipment                  69,510      62,770
                                                      105,684      97,583
              Accumulated depreciation                (48,871)    (42,550)
                                                       56,813      55,033
             Cash restricted for purchase and
              construction of equipment (Note 5)          560       1,130
             Goodwill, net of accumulated
              amortization of $2,214 in 1998 and
              $960 in 1997                             43,927      15,257
             Long-term investments                      1,016       1,016
             Other assets, net of accumulated
              amortization of intangible assets of
              $709 in 1998 and $412 in 1997             2,352       2,922
               Total assets                          $194,049    $164,483

             LIABILITIES AND SHAREHOLDERS' EQUITY
             Current liabilities:
              Accounts payable                         $ 9,156    $ 9,728
              Line of credit advances (Note 6)          26,000     14,012
              Notes payable and current portion of
              long-term debt (Note 9)                    2,177      2,162
              Accrued compensation and employee
              benefits                                   4,475      6,125
              Other accrued liabilities (Note 8)        13,597     11,825
               Total current liabilities                55,405     43,852
             Long-term debt (Note 9)                    31,665     13,792
             Deferred income taxes (Note 12)             4,806      4,439
             Other liabilities                              18         25
             Commitments and contingencies (Note 14)
             Shareholders' equity (Note 10):
              Common stock, $0.01 par value
               Authorized -- 50,000,000 shares
               Issued -- 1998:  13,991,291 and 1997:
               13,943,544 shares                           140        140
              Capital in excess of par value            20,733     20,261
             Retained earnings                          79,075     80,128
             Other comprehensive income                  2,207      1,846
              Total shareholders' equity               102,155    102,375
             Total liabilities and shareholders'
             equity                                   $194,049   $164,483

             The accompanying notes are an integral part of the
             consolidated financial statements.


                                   OSMONICS, INC.
                        CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (In thousands)


                                                Year ended December 31,
                                              1998       1997      1996
                                             -------    -------   -------
       Cash flows from operations:
         Net income (loss)                   $(1,053)   $ 9,793   $13,467
         Non-cash items included in net
         income:
           Depreciation and amortization       7,964      5,791     4,874
           Deferred income taxes              (2,059)     1,176     1,849
           Gain on sale of land and           (1,285)      (573)   (3,396)
             investments
           Special charges                     9,988      1,448       -
           Recovery on discontinued
             operations                          -       (1,947)      -
         Changes in assets and liabilities
         (net of business acquisitions):
           Accounts receivable                (3,774)     1,370    (4,648)
           Inventories                         7,367      1,806    (3,349)
           Other current assets               (3,052)       457       155
           Accounts payable and accrued
             liabilities                      (5,994)    (2,553)   (3,216)
           Net cash provided by operations     8,102     16,768     5,736 

       Cash flows from investing
         activities:
         Business acquisitions (net of cash
         acquired)                           (39,880)   (13,992)      -
         Purchase of investments                (808)      (902)   (1,418)
         Maturities and sales of
         investments                           4,480      2,478     9,570
         Purchase of property and equipment   (7,808)    (6,609)  (15,658)
         Sales of property and equipment         110        456     2,535
         Pending acquisition costs               -       (1,200)      -
         Other                                   424       (245)     (169)
           Net cash used in investing
            activities                       (43,482)   (20,014)   (5,140)

       Cash flows from financing
         activities:
         Proceeds from notes payable and
         current debt                         32,000     16,967       882
         Reduction of long-term debt          (2,264)   (10,394)   (2,219)
         Cash restricted for purchase and
         construction of Equipment               570        830        74
         Issuance of common stock                472        934     1,324
         Purchase of common stock                -       (5,249)      - 
           Net cash provided by financing
            activities                        30,778      3,088        61

         Effect of exchange rate changes on
         cash                                    306       (362)        6
       Increase (decrease) in cash and cash
         equivalents                          (4,296)      (520)      663
       Cash and cash equivalents -
         beginning of year                     4,872      5,392     4,729
       Cash and cash equivalents - end of 
         year                                 $  576     $4,872   $ 5,392

       The accompanying notes are an integral part of the
       consolidated financial statements.


                                    OSMONICS, INC.
             CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
                           (In thousands, except share data)


                                           Capital          Accum-
                                             in             ulated
                                           Excess   Ret-     Other     Total
                                             of     ained   Compre-    Share-
                           Common Stock      Par    Earn-   hensive   holders
                          Shares    Amount  Value   ings   Income(2)   Equity
      Balance -
       January 1,
       1996              14,086,007 $141   $21,805 $58,314   $4,013   $84,273
       Comprehensive
       income
        Net income              -    -         -    13,467      -      13,467
        Other
        compre-
        hensive
        income(1)
         Trans-
          lation
          adjustment            -    -         -       -       (291)     (291)
         Marketable
          securities
          adjustment
          (3)                   -    -         -       -       (830)     (830)
       Other
       comprehensive
       income                   -    -         -       -     (1,121)   (1,121)
       Total
       comprehensive
       income                   -    -         -       -         -     12,346
       Employee
       stock
       purchase
       plans                107,232    1     1,323     -         -      1,324

      Balance -
       December 31,
       1996              14,193,239  142    23,128  71,781     2,892   97,943
       Comprehensive
       income
        Net income              -    -         -     9,793       -      9,793
        Other
        compre-
        hensive
        income(1)
        Trans-lation
        adjustment              -    -         -       -        (362)    (362)
        Marketable
        securities
        adjustment (3)          -    -         -       -        (684)    (684)
       Other
       comprehensive
       income                   -    -         -       -      (1,046)  (1,046)
       Total
       comprehensive
       income                   -    -         -       -         -      8,747
       Purchase of
       common stock       (316,100)   (3)   (3,800) (1,446)      -     (5,249)
       Employee stock
       purchase plans       66,405     1       933     -         -        934
    
      Balance -
       December 31,
       1997             13,943,544   140    20,261  80,128     1,846  102,375
       Comprehensive
       income (loss)
        Net loss               -     -         -    (1,053)      -     (1,053)
        Other
        compre-
        hensive
        income(1)
        Translation
        adjustment             -     -         -       -         306      306
        Marketable
        securities
        adjustment (3)         -     -         -       -          55       55
       Other
       comprehensive
       income                  -     -         -       -         361      361
       Total
       comprehensive
       income (loss)           -     -         -       -         -       (692)
       Employee stock
       purchase plans       64,819   -         664     -         -        664
       401(k) stock
       match                23,468   -         234     -         -        234
       Recovery of
       common stock        (40,540)  -        (426)    -         -       (426)

      Balance -
       December 31,  
       1998            $13,991,291  $140   $20,733 $79,075    $2,207 $102,155

      (1) All items included in other comprehensive income are shown net
          of taxes.  The tax effect for the marketable securities
          adjustment was $22, $(265), and $(315) for 1998, 1997 and 1996,
          respectively.

      (2) Accumulated other comprehensive income is comprised of
          accumulated currency translation of $(28), $(334) and $28; and
          marketable securities adjustment of $2,235, $2,180 and $2,864 at
          December 31, 1998, 1997 and 1996, respectively.

      (3) Marketable securities reclassification adjustment for gains
          realized in net income (net of tax) was $859, $573 and $2,766
          for 1998, 1997 and 1996, respectively.


                                 FIVE-YEAR RESULTS
                     (In thousands, except per share amounts)

            INCOME DATA:  (Restated for poolings-of-interests)

                                       Year ended December 31,
                               1998     1997     1996     1995     1994
                             -------- -------- -------- -------- --------
            Sales            $177,819 $164,905 $155,946 $130,783 $112,908

            Income (loss)
            rom continuing
            operations         (1,053)   8,643   13,467   11,879   10,454

            Net income
            (loss)             (1,053)   9,793   13,467   11,879   10,454

            Earnings (loss)
             per share -
             basic (Note 16)
            Income (loss)
             from continuing
             operations        $(0.08)   $0.60    $0.95    $0.84    $0.75
            Net income
             (loss)            $(0.08)   $0.70    $0.95    $0.84    $0.75

            Earnings (loss)
             per share -
             assuming
             dilution
             (Note 16)
            Income (loss)
             from continuing
             operations        $(0.08)   $0.59    $0.93    $0.83    $0.74
            Net income
             (loss)            $(0.08)   $0.68    $0.93    $0.83    $0.74

            Average shares
            outstanding
              Basic            13,976   14,031   14,145   14,058   13,941
              Assuming
              dilution         13,976   14,313   14,458   14,365   14,206


            BALANCE SHEET DATA:  (Restated for poolings-of-interests)

            Total assets     $194,049 $164,483 $152,176 $142,419 $110,715

            Long-term debt     31,665   13,792   15,900   20,919   14,475


                              QUARTERLY FINANCIAL DATA
                      (In thousands, except per share amounts)


            Quarterly Financial Data - 1998

                                             Quarter Ended
                               March 31  June 30(b)  September 30  December 31
                               --------  ----------  ------------  -----------
            Sales               $42,150     $47,353     $44,606      $43,710

            Gross profit         16,107      15,445      16,506       15,043

            Net income (loss)     2,164      (5,283)        977        1,089

            Net income (loss)
            per share -           $0.16      $(0.38)      $0.07        $0.08
            basic (a)

            Net income (loss)
            per share -
            assuming              $0.15      $(0.38)      $0.07        $0.08
            dilution(a)


            Quarterly Financial Data - 1997

                                             Quarter Ended
                            March 31(b)     June 30  September 30  December 31
                            -----------     -------   ------------   -----------
            Sales               $42,313     $41,789     $42,420      $38,383

            Gross profit         16,349      16,858      16,954       14,884

            Net income            2,759       2,593       2,296        2,145

            Net income per
            share -               $0.19       $0.18       $0.16        $0.15
            basic (a)

            Net income per
            share - assuming      $0.19       $0.18       $0.16        $0.15
            dilution(a)

            (a) Income per share has been restated to reflect the
                adoption of the Statement of Financial Accounting
                Standards No. 128, "Earnings per Share" (SFAS No. 128).
                See Note 16 of the consolidated financial statements.

            (b) Special charges of $9,988 ($0.54 per share after taxes
                assuming dilution) were recorded during the second
                quarter of 1998.  Special charges of $1,448 ($0.07 per
                share after taxes) were recorded during the fourth
                quarter of 1997.  Recovery from discontinued operations
                of $325 ($0.02 per share) and $1,005 ($0.07 per share)
                were recorded in first and fourth quarters of 1997,
                respectively.


                     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                      (Dollars in thousands, except share data)


            1. Summary of Significant Accounting Policies

               Osmonics, Inc. is a manufacturer and marketer of high
               technology water purification, fluid filtration, fluid
               separation, and fluid transfer equipment and
               instruments, as well as the replaceable components used
               in purification, filtration, and separation equipment.
               These products are used by a broad range of industrial,
               commercial, consumer and institutional customers.

               The consolidated financial statements include the
               accounts of Osmonics, Inc. and its wholly and majority
               owned subsidiaries (the Company).  Significant
               intercompany accounts and transactions have been
               eliminated.

               Sales are recorded when the product is shipped or the
               service is provided.

               The estimated fair value for notes payable and long-term
               debt approximates carrying value due to the relatively
               short-term nature of the instruments and/or due to the
               short-term floating interest rates on the borrowing.
               The estimated fair value of notes receivable
               approximates the net carrying value, as management
               believes the respective interest rates are commensurate
               with the credit, interest rate, and repayment risks
               involved.

               The Company considers highly liquid debt instruments
               purchased with a maturity of three months or less to be
               cash equivalents.

               Inventories are stated at lower of cost (first-in, first-
               out method) or market for all operations except for two
               plants which have historically valued inventory on the
               last-in, first-out method.

               Depreciation and amortization of property and equipment
               are provided on the straight-line method over estimated
               lives of 3 to 40 years.

               Deferred income taxes have been provided for income and
               expenses which are recognized in different accounting
               periods for financial reporting purposes than for income
               tax purposes.

               The Company accrues for the estimated cost of warranty
               obligations at the time revenue is recognized.

               The excess of cost over the fair market value of assets
               acquired in acquisitions is amortized over not more than
               40 years, with the majority at 30 years.  In accordance
               with Statement of Financial Accounting Standards (SFAS)
               No. 121 on impairment of long-lived assets, the carrying
               values of these intangibles are reviewed quarterly for
               impairment using discounted cash flows when events or
               circumstances warrant such a review.  Other intangibles
               are carried at cost and amortized using the
               straight-line method over their estimated lives of 5 to
               20 years.

               In 1998, the Company adopted SFAS No. 130, Reporting
               Comprehensive Income; SFAS No. 131, Disclosure about
               Segments of an Enterprise and Related Information 
               (Note 13); and SFAS No. 132, Pension and Other Post-
               Retirement Disclosures which did not have a material
               impact on operating results or financial position.

               The preparation of financial statements in conformity
               with generally accepted accounting principles requires
               management to make estimates that affect the reported
               amounts of assets and liabilities, the disclosure of
               contingent assets and liabilities, and the reported
               amounts of revenues and expenses during the reporting
               period.  Actual results could differ from those estimates.

               Certain reclassifications have been made to prior year
               amounts to conform with current year presentations.


            2. Business Acquisitions

               On February 17, 1998, the Company acquired all of the
               equity interest of Micron Separations, Inc. (MSI) of
               Westborough, Massachusetts.  The purchase price was
               approximately $25,000 which included $1,902 of in-
               process research and development (R&D) and $13,600 of
               goodwill, which is being amortized on the straight-line
               method over 30 years.  MSI products are being sold
               through existing Osmonics distribution channels,
               complementing the Company's existing cartridge filter
               products and providing a broader portfolio of diagnostic
               and laboratory membrane products to the laboratory and
               analytical testing markets.  Revenues of MSI were less
               than $15,000 in 1997 and 1996.  The acquisition was
               recorded under the purchase method of accounting.

               The results of operations of MSI are included in the
               consolidated statements of operation from the date of
               acquisition.

               On April 29, 1998, the Company acquired all of the equity
               interest of Membrex Corp. ("Membrex") of Fairfield, New
               Jersey.  The purchase price was approximately $16,000
               plus assumed net liabilities of approximately $3,000.
               The price included $4,320 of in-process R&D and $15,700
               of goodwill, which is being amortized on the straight-
               line method over 30 years.  Membrex products are
               primarily related to membrane products and oil/water
               separating systems for commercial and industrial
               customers.  Revenues of Membrex were less than $10,000
               in 1997 and 1996.  The acquisition was recorded under
               the purchase method of accounting.

               The results of operations of Membrex are included in the
               consolidated statements of operations from the date of
               acquisition.

               Pro forma 1997 combined financial results of Osmonics,
               Inc., MSI and Membrex would be as follows:

                 1997:                Osmonics    MSI    Membrex  Combined
                 -----                --------  -------  -------  --------
                 Sales                $164,905  $10,038   $6,333  $181,276
                 Income from
                 operations             13,359      244   (1,920)   11,683
                 Net income (loss)       9,793   (1,233)  (3,237)    5,323
                 Net income per
                   share - assuming
                   dilution              $0.68                       $0.37

               1997 financial results of MSI include $3,200 of non-
               recurring charges associated with the settlement of a
               patent infringement lawsuit.

               The pro forma combined impact on financial results for
               1998 was not material.

               On February 25, 1997, the Company acquired all of the
               equity interest of AquaMatic, Inc. of Rockford,
               Illinois.  The purchase price was approximately $15,000
               and included $7,600 of goodwill which is being amortized
               on the straight-line method over 40 years.  AquaMatic
               products are being sold through existing Osmonics
               distribution channels, offering a more complete line of
               specialty valves and controllers.  Revenues of AquaMatic
               were less than $15,000 in 1996 and 1995.  The
               acquisition was recorded under the purchase method of
               accounting.

               The results of operations of AquaMatic are included in
               the consolidated statements of operations from the date
               of acquisition.

               On July 24, 1996, Desalination Systems, Inc. (DSI) merged
               with the Company through an exchange of 1,312,827 shares
               of the Company's common stock for the Class A common
               stock and Class B common stock of DSI.  The transaction
               was accounted for as a pooling-of-interests.  DSI's
               principal business is the manufacture of membranes used
               for reverse osmosis, nanofiltration, ultrafiltration and
               microfiltration.  The historical financial statements of
               the Company have been restated to give effect to the
               acquisition as though the companies had operated
               together from the beginning of the earliest period
               presented.  Separate results of operations of the
               combined entities for the six months ended June 30, 1996
               were as follows:

                                                      Six Months
                                                 Ended June 30, 1996
                                                 -------------------
                 Sales:
                   Osmonics                            $ 64,405
                   DSI                                   11,642
                   Eliminations                            (269)
                     Combined                          $ 75,778

                 Net income:
                   Osmonics                             $ 5,975
                   DSI                                      721
                     Combined                           $ 6,696

               The eliminations represent sales between the combined
               entities prior to the combination.  The sales
               elimination had no significant effect on net income in
               the years presented.


            3. Marketable Securities

               The Company considers all of its marketable securities
               available-for-sale.  Marketable securities at December
               31, 1998 consisted of the following:


                                    Amortized  Unrealized  Unrealized  Fair
                                      Cost       Gains      (Losses)   Value
                                    ---------  ----------  ----------  -----
                U.S. government
                  securities
                  0-5 year
                  maturity           $1,640       $  36      $  (1)   $1,675

                Municipal bonds
                  0-5 year
                  maturity            3,847         222          -     4,069
                  6 year or
                  greater maturity    1,009          47          -     1,056

                Corporate debt
                  securities
                  and other
                  0-5 year
                  maturity              478           2         (3)      477

                Equity securities     3,602       3,723       (331)    6,994

                Total before-tax    
                  effect            $10,576       4,030       (335)  $14,271

                Deferred tax
                  effect of
                  unrealized
                  (gains) losses                 (1,592)       132

                Net unrealized
                  gains (losses)
                  on marketable     
                  securities                     $2,438      $(203)

            Marketable securities at December 31, 1997 consisted of the
            following:

                                    Amortized  Unrealized  Unrealized  Fair
                                      Cost       Gains      (Losses)   Value
                                    ---------  ----------  ----------  -----
                U.S. government
                  securities
                  0-5 year
                  maturity            $3,835       $ 28      $ (15)   $3,848
                  6 year or
                  greater maturity       400        -           (1)      399

                Municipal bonds
                  0-5 year
                  maturity             3,517        175          -     3,692
                  6 year or
                  greater maturity       998         91          -     1,089

                Corporate debt
                  securities
                  and other
                  0-5 year
                  maturity               707          2         (7)      702
                  6 year or
                  greater maturity       100          4          -       104

                Equity securities      3,887      3,432       (149)    7,170

                Total before-tax 
                  effect             $13,444     $3,732     $ (172)  $17,004

                Deferred tax
                  effect of
                  unrealized
                  (gains) losses                 (1,447)        67

                Net unrealized
                  gains (losses)
                  on marketable
                  securities                     $2,285     $ (105)

               In 1998, proceeds from sales of available-for-sale
               securities were $2,253.  The gains and losses on these
               sales were $949 and $90, respectively, determined on the
               specific identification method.

               Market values are based on quoted market prices.

               In 1997, proceeds from sales of available-for-sale
               securities were $1,678.  The gains and losses on these
               sales were $614 and $41, respectively, determined on the
               specific identification method.


            4. Inventories

               Inventories consist of the following:

                                                      December 31,
                                                  1998           1997
                                                --------       --------
                Finished goods                  $  9,455       $  9,757
                Work in process                    5,156          7,544
                Raw materials                     15,479         19,832
                                                  30,090         37,133
                Adjustment to reduce
                  inventories of $10,700 and
                  $12,446 to the last-in,
                  first-out method
                  (See Note 1)                    (1,967)        (1,905)

                                                 $28,123        $35,228

            5. Restricted Cash

               Cash restricted for purchase and construction of
               equipment at December 31, 1998 and 1997 represents
               proceeds received from the issuer of Industrial
               Development Revenue Bonds (see Note 9) restricted to the
               purchase and construction of property and equipment used
               in one of the Company's operations.


            6. Line of Credit

               The Company, at December 31, 1998, had an unsecured
               revolving line of credit of $35,000 for working capital
               needs.  The revolving line of credit matures on March
               31, 2003 and borrowings bear a variable interest rate
               related to LIBOR.  The terms of the credit agreement
               contain certain restrictions related to financial
               ratios, indebtedness, tangible net worth and capital
               expenditures.  As of December 31, 1998, the Company was
               not in compliance with all debt covenants; however, a
               debt compliance waiver was obtained (Note 9).  As of
               December 31, 1997, the Company was in compliance with
               all debt covenants.  At December 31, 1998, the Company
               had borrowings outstanding under the line of $26,000,
               and the interest rate was 7.08%.  At December 31, 1997,
               the Company had borrowings outstanding under the line of
               $14,012, and the interest rate was 6.27%.


            7. Discontinued Operations

               In September 1982, Autotrol Corporation (Autotrol), which
               has since been merged with the Company, discontinued its
               wastewater business.  In subsequent years Autotrol
               incurred certain expenses related to the wastewater
               products and accrued for contingent liabilities.  The
               Company determined in 1997 that the reserve was no
               longer required and recognized $1,330 ($0.09 per
               share.assuming dilution) of after-tax income as a
               recovery on discontinued operations.


            8. Other Accrued Liabilities

               Other accrued liabilities consist of the following:

                                                   December 31,
                                                 1998       1997
                                                -------    -------
                Warranty and start-up           $ 2,098    $ 1,900
                Professional fees and other
                accruals                          4,390      2,123
                Deferred acquisition-related
                payments                          2,827      3,000
                Customer deposits                 4,282      4,802

                                                $13,597    $11,825

            9. Debt

               Long-term debt is as follows:

                                                     December 31,
                                                  1998       1997
                                                 -------    -------
                Promissory notes; interest
                  payable quarterly at the
                  three-month LIBOR plus 80
                  b.p.; due through 2001.  The   $ 5,725    $ 7,150
                  interest rate on December
                  31, 1998 was 6.24%.

                Industrial development revenue
                  bonds (IDRB's), principal
                  due in varying annual
                  payments over 30 years;
                  interest payable monthly at
                  a variable rate determined       7,450      7,950
                  periodically by the bond
                  remarketing agent (5.35% at
                  December 31, 1998).

                Promissory notes; interest
                  payable quarterly at fixed       5,000         -
                  rate of 6.72%; due through
                  2008.

                Promissory notes; interest
                  payable quarterly at the
                  three-month LIBOR plus 
                  75 b.p.; due through 2008.      15,000         -
                  The interest rate on
                  Decembber 31, 1998 was 6.19%.

                Mortgage notes payable to two
                  French banks; interest
                  payable monthly at PIBOR
                  plus 40 b.p.  The interest         402         502
                  rate on  December 31, 1998
                  was 3.25%.

                Other notes                          265         352

                                                  33,842      15,954

                Current portion                   (2,177)     (2,162)

                                                 $31,665     $13,792

               The IDRB debt and mortgage notes payable to French banks
               are collateralized by real and personal property of the
               Company.

               Aggregate maturities of long-term debt outstanding at
               December 31, 1998 are:

               1999 - $2,177; 2000 - $2,253; 2001 - $2,253; 2002 -
               $5,146; 2003 - $3,679; beyond 2003 - $18,334.

               The promissory notes contain a covenant which limits the
               payment of dividends to shareholders.  At December 31,
               1998, approximately $5,000 of retained earnings were
               restricted under this covenant.  In addition, the
               Company's various debt agreements contain certain
               restrictions related to financial ratios, indebtedness,
               tangible net worth and capital expenditures.

               As a result of financial results in 1998, the Company was
               out of compliance with the Leverage Ratio requirement
               related to its revolving line of credit at various
               measurement dates throughout the year and the Fixed
               Charge Coverage ratio related to its long-term debt at
               December 31, 1998.  The Company has received a waiver
               from the lenders in regard to these covenants.  In
               addition, the Company entered into a loan amendment with
               the revolving line of credit lender in February 1999
               which reduces the Leverage Ratio requirement.  As of
               December 31, 1998 and 1997, the Company was in
               compliance with all other debt covenants.

               The Company also has an unsecured standby letter of
               credit of $5 million with a large financial institution.
               As of December 31, 1998, no amount was outstanding.

               Cash payments for interest related to all debts of the
               Company were $4,037, $2,033, and $1,551, for the years
               ended December 31, 1998, 1997, and 1996, respectively.


           10. Stock Options

               In 1998, the Board of Directors approved an amendment to
               the 1993 Stock Option Plan which expanded reserved
               common shares to 800,000 from 298,863.  The expansion of
               this plan is intended to facilitate ownership and
               increase the interest of key employees in the growth and
               performance of the Company, thus enhancing the value of
               the Company for the benefit of the shareholders.
               Options are granted at a price not less than market
               value on the date of the grant and become exercisable
               over a period of up to ten years, after which they
               expire.  The 1993 Stock Option Plan terminates on
               September 1, 2003.

               The Company's 1995 Director Stock Option Plan provides
               that each director of the Company shall automatically
               receive, as of the date of each Annual Meeting of
               Shareholders, a non-qualified option to purchase 3,000
               shares of the Company's common stock.  The options have
               a ten-year term and are exercisable one year after the
               grant date at an exercise price equal to the fair market
               value of the shares on the grant date.  The 1995
               Director Stock Option Plan terminates on May 17, 2005.

               Shares reserved for future issuance under all of the
               Company's plans totaled approximately 1.855 million at
               December 31, 1998.

               The Company applies Accounting Principals Board (APB)
               Opinion No. 25 "Accounting for Stock Issued to
               Employees" and related interpretations in accounting for
               its plans.  No compensation cost has been recognized for
               its stock-based compensation plans as the exercise price
               of the stock option grants was equal to the fair market
               value of the shares on the grant date.  Had compensation
               costs been determined based on the fair value of the
               1998, 1997, and 1996 stock option grants consistent with
               the requirements of SFAS No. 123 "Accounting for Stock-
               Based Compensation" (SFAS 123), net income and earnings
               per share would have been reported as the following pro
               forma amounts:

                                       1998      1997       1996
                                     --------   ------     -------
                 Net income (loss)
                    As reported      $(1,053)   $9,793     $13,467
                    Pro forma        $(1,468)   $9,613     $13,422

                 Earnings (loss)
                 per share _
                 assuming dilution
                    As reported      $ (0.08)   $ 0.68     $  0.93
                    Pro forma        $ (0.11)   $ 0.67     $  0.93

               The fair value of the stock options used to calculate the
               pro forma net income and earnings per share amounts
               above is estimated using the Black-Scholes options
               pricing model with the following weighted average
               assumptions:

                                       1998       1997       1996
                                      -----      -----      -----
                 Dividend yield          0%         0%         0%
                 Expected
                   volatility         42.5%      24.2%      22.5%
                 Risk-free
                   interest rate       6.0%       6.0%       6.1%
                 Expected life         5.0        5.0        5.0

               Information related to stock options at December 31 under
               the aforementioned stock option plans is as follows:


                                    1998            1997            1996
                                   Weighted        Weighted        Weighted
                                   Average         Average         Average
                            Shares Exercise Shares Exercise Shares Exercise
            Stock Options   (000)   Price   (000)   Price   (000)   Price
            -------------   ------ -------- ------ -------- ------ -------- 
            Outstanding at
             beginning of
             year             653   $  9.9     505  $  7.8     470   $  6.9
            Granted           379     11.9     154    17.2      35     19.7
            Exercised           -        -       -       -       -        -
            Forfeited          85     15.5       6    17.5       -        -
            Outstanding at
             end of year      947     10.2     653     9.9     505      7.8
            Options
             exercisable
             at year-end      486      7.4     410     6.7     329      6.0
            Weighted
             average
             fair value of
             options
             granted
             during the
             year           $5.48            $5.81           $6.59


            The following table summarizes information about stock
            options outstanding at December 31, 1998:

                                                               Options
                               Options Outstanding          Exercisable
                          ------------------------------  -----------------
                            Shares                         Shares
                          Outstandi  Remaining  Weighted  Exercis-  Weighted
              Range of      ng at      Con-     Average    able at  Average
              Exercise     12/31/98  tractual   Exercise  12/31/98  Exercise
               Prices       (000)      Life      Price      (000)    Price
           -------------  ---------  --------   --------  --------  --------
            2.23 -  6.72     373      3.7 yrs   $ 4.95       373     $ 4.95
            8.95 - 13.42     286      9.0 yrs    10.41        45      12.33
           13.43 - 17.90     253      8.5 yrs    16.42        50      16.68
           17.91 - 22.38      35      7.5 yrs    19.57        18      19.57


               In 1998, the Company adopted a Stock Match Plan under
               which the Company matches, in the form of Company common
               stock, certain eligible U.S. employee savings plan
               contributions.  Employees are vested in the shares
               immediately.  Shares issued under the Stock Match Plan
               approximated 23,468 shares in 1998 at a cost of
               approximately $234,000.  At December 31, 1998, there
               were approximately 176,500 shares reserved for future
               issuance.

               The Company has an Employee Stock Purchase Plan which
               allows eligible employees to purchase common shares of
               the Company at 85% of market price.  During 1998,
               approximately 64,819 shares were issued at prices
               ranging from $7.18 to $14.08 per share.  During 1997,
               approximately 59,000 shares were issued at prices
               ranging from $12.40 to $17.58 per share.  During 1996,
               approximately 41,000 shares were issued at prices
               ranging from $16.10 to $20.03 per share.  At December
               31, 1998, there were approximately 213,000 shares
               reserved for future issuance.

               The Company had 500,000 authorized and unissued shares of
               preferred stock at December 31, 1998 and 1997.


           11. Income Taxes

               Income tax expense consists of:
                                               Year ended December 31,
                                               1998      1997     1996
                                             -------   -------  -------
                Current:
                  Federal                    $   213    $2,741   $3,556
                  State                          261       (39)     395
                  Foreign                        395       666      640
                Deferred:
                  Depreciation                   298       351      370
                  Amortization of
                    intangibles               (1,387)      261       47
                  Net operating loss usage       508         -        -
                  Allowance for doubtful
                    accounts, start-up,
                    warranty, inventory and
                    other accruals              (347)      100      462
                  Other                           34      (153)     971
                  Total continuing
                    operations                $  (25)   $3,927   $6,441
                  Discontinued operations,
                    deferred                       -       617        -
                  Total provision             $  (25)   $4,544   $6,441


               Cash payments for income taxes were $3,624, $3,728, and
               $5,204, for the years ended December 31, 1998, 1997, and
               1996, respectively.

               At the point when the Company acquired MSI on February
               17, 1998, MSI had incurred $11,827 of tax losses, which
               had not yet been offset against previous or subsequent
               years' taxable income of MSI.  Subsequent to the period
               reported herein, MSI filed a refund request that offset
               $8,684 of these losses against income of MSI for the
               years from 1988 to 1995, under the "Claim of Right"
               rule.  $1,329 of the remaining losses were offset
               against MSI income in 1998.  The balance of the losses,
               amounting to $1,814, will be offset against future
               years' income.  These loss carryforwards expire after
               the year 2017.

               A reconciliation of the income taxes computed at the
               Federal statutory rate to the Company's income tax
               expense is as follows:

                                               Year ended December 31,
                                                1998      1997     1996
                                              -------    ------   ------
                Taxes at Federal rate (35%)   $ (377)    $4,337   $6,950
                Increase (decrease)
                  resulting from:
                State taxes, net of Federal
                  tax benefit                    216        132     397
                Foreign Sales Corp. benefit     (503)      (546)   (361)
                Tax credits                     (307)      (249)   (197)
                Tax-exempt
                  interest/dividend
                  deduction                     (123)      (123)   (128)
                Effect of foreign
                  affiliates with different
                  tax rates or net losses         91        167      30
                Nondeductibility of
                  intangible write-offs and
                  amortization                   851         35     (15)
                Uncollectible account
                  write-off                        -          -    (442)
                Other                            127        174     206
                Total continuing operations   $  (25)    $3,927  $6,440
                Discontinued operations            -        617       -
                Total provision               $  (25)    $4,544  $6,440


           12. Deferred Tax Assets and Liabilities

               Temporary differences which give rise to deferred tax
               assets and liabilities are as follows as of December 31:

                                               1998     1997
                                              ------   ------
                 Current assets:
                   Allowance for doubtful
                    accounts, start-up,
                    warranty, inventory and   $3,966   $2,955
                    other accruals
                   Unrealized gain on
                    marketable securities     (1,410)  (1,380)
                   Inventory costs               122       81
                    capitalized for tax
                   Net operating losses
                    available for carryback    4,051        -
                    or carryforward
                   Other                        (119)    (243)
                   Total current deferred
                    Assets                    $6,610   $1,413
                 Noncurrent liabilities:
                   Depreciation               $4,098   $3,718
                   Other                         708      721
                   Total non-current
                    deferred tax liabilities  $4,806   $4,439 


           13. Sales and Segment Information

               The Company designs, manufactures and markets equipment,
               systems and components used in the processing and
               handling of fluids.  The Company markets through five
               marketing units made up of related product lines.
               Certain marketing units have similar economic
               characteristics and have been aggregated under Statement
               of Financial Accounting Standards No. 131, "Disclosures
               about Segments of an Enterprise and Related
               Information,"(SFAS No. 131).  As a result of aggregation,
               the Company has two reportable business segments,
               Consumables and Equipment.

               The Consumables segment, comprised of two marketing
               units, includes products such as filter cartridges,
               membrane elements, membrane, instruments, and laboratory
               products.  The Equipment segment, comprised of three
               marketing units, includes products such as pumps,
               housings, valves, controls, reverse
               osmosis/ultrafiltration (RO/UF) machines, ozonators,
               stills, and water treatment systems.  Each segment is
               currently supported by several manufacturing facilities,
               a similar sales force and various corporate functions.
               The segments do not have separate accounting, customer
               service, administration, or purchasing functions.

               The marketing unit structure was established to provide
               strategic leadership for related products.  It was
               implemented on July 1, 1998.  As a result, six months of
               financial results are available to report under SFAS No.
               131.  Restatement of prior period results under this
               method of reporting has been deemed impracticable due to
               the anticipated costs and unavailability of such
               financial information.

               Sales include external sales only.  Inter-segment sales
               primarily occur with Consumables products being included
               in Equipment products which could be significant.  The
               reportable segment information for the six-month period
               ended December 31, 1998 is as follows:

                                       Consumables  Equipment  Consolidated
                                                                  Total
                                       -----------  ---------  ------------
               Sales                     $36,631     $51,685     $ 88,316
               Cost of sales              22,342      34,425       56,767
               Gross profit               14,289      17,260       31,549
                 Gross margin %            39.0%        33.4%        35.7%

               Selling, general &
               administrative              9,527      13,579       23,106
               Research, development
               & engineering               1,904       3,162        5,066
               Operating expenses         11,431      16,741       28,172 

               Operating income          $ 2,858     $   519      $ 3,377

               Other income (expense)                              (1,234)
               Income before taxes                                  2,143
               Income taxes                                            77
               Net income                                         $ 2,066

               Currently, management does not report or analyze the
               balance sheet or any cash-generating measurements by such
               segments.

               All continuing operations for which geographic data is
               presented below are in one principal industry (design,
               manufacture and marketing of machines, systems,
               instruments and components used in the processing of
               fluids).

                                              1998      1997      1996
                                            --------  --------  --------
                 Sales to unaffiliated
                  customers from:

                   United States            $163,908  $150,753  $141,124
                   Foreign operations         13,911    14,152    14,822

                 Transfers from (to)
                  geographic areas:

                   United States               8,780     7,818     7,890
                   Foreign operations         (8,780)   (7,818)   (7,890)

                                            $177,819  $164,905  $155,946

                 Income (loss) from
                  continuing operations
                  before income taxes:

                   United States            $( 1,926)  $10,847   $18,225
                   Foreign operations            848     1,543     1,683

                                            $ (1,078)  $12,390   $19,908

                 Identifiable assets:

                   United States            $185,814  $155,592  $144,609
                   Foreign operations          8,235     8,891     7,567

                                            $194,049  $164,483  $152,176

               NOTE:  Transfers are made at fair market value.

               Sales by United States operations to unaffiliated
               customers in foreign geographic areas are as follows:

                                           Year ended December 31,
                                         1998       1997        1996
                                       -------    -------     -------
                 Asia/Pacific          $15,967    $20,030     $14,661
                 Euro/Africa            17,710     14,536       9,181
                 Americas               11,227     11,678       9,222
                                       $44,904    $46,244     $33,064

               Total international sales for the Company were as follows:
               1998 - $58,815; 1997 - $60,396; and 1996 - $47,886.


           14. Commitments and Contingencies

               The Company leases facilities for sales, service or
               manufacturing purposes in Wisconsin, Massachusetts,
               California, New Jersey, Florida, Iowa, Switzerland,
               Germany, Hong Kong, Japan, China, Singapore, and
               Thailand.

               Future minimum lease payments on all operating leases of
               $5,195 are payable as follows:  1999 - $1,423; 2000 -
               $1,015; 2001 - $862; 2002 - $605; 2003 - $390; and
               beyond 2003 - $180.  Rent expense for the three years
               ended December 31 was:  1998 - $1,794; 1997 - $1,633;
               and 1996 - $1,100.

               The Company is involved in certain legal actions arising
               in the ordinary course of business.  In the opinion of
               management, based on the advice of legal counsel, such
               litigation and claims will be resolved without a
               material effect on the Company's financial position or
               results of operations.


            15. Employee Benefit Plans

               The Company has a noncontributory discretionary profit
               sharing plan covering certain employees meeting age and
               length of service requirements.  The Company contributes
               annually to the plan an amount established at the
               discretion of the Board of Directors.

               Total expense recognized by the Company under these plans
               amounted to $687, $1,300, and $1,435 in 1998, 1997, and
               1996, respectively.


            16. Earnings Per Share

               Effective December 31, 1997, the Company adopted
               Statement of Financial Accounting Standards No. 128,
               "Earnings per Share" (SFAS No. 128).  The following
               table reflects the calculation of basic and diluted
               earnings per share from continuing operations.

                                                 1998     1997     1996
                                               --------  ------  -------
                Earnings (loss) per share -
                  basic
                Income (loss) from continuing
                  operations available to
                  common stockholders          $(1,053)  $8,463  $13,467
                Weighted average shares
                  outstanding                   13,976   14,031   14,145
                Income (loss) from continuing
                  operations per share - basic  $(0.08)  $ 0.60   $ 0.95
                Earnings (loss) per share -
                  assuming dilution
                Income (loss) from continuing
                  operations available to
                  common stockholders          $(1,053)  $8,463  $13,467
                Weighted average shares
                  outstanding                   13,976   14,031   14,145
                Dilutive impact of stock
                  options outstanding                -      282      313
                Weighted average shares and
                  potential dilutive shares
                  outstanding                   13,976   14,313   14,458
                Income (loss) from continuing
                  operations per
                  share - assuming dilution    $ (0.08)  $ 0.59   $ 0.93

               Options to purchase approximately 285,000 shares of
               common stock were outstanding during 1998, but were not
               included in the computation of diluted earnings per
               share because they would have been antidilutive.

               Additionally, options to purchase 334,000 shares of
               common stock at a range of $13.67 to $22.38 were
               outstanding during 1998 but were not included in the
               computation of diluted earnings per share because the
               options' exercise price was greater than the average
               market price of the common share.


            17. Special Charges

               In 1998, the Company recorded special charges of $9,988
               ($7,569 net-of-tax or $0.54 per share assuming
               dilution).  Charges include a $6,222 charge to operating
               expense for in-process research and development (Note 2)
               related to the acquisitions of Micron Separations, Inc.
               ($1,902) and Membrex Corp. ($4,320) and a $2,000 charge
               to cost of sales for slow moving inventory.  The special
               charges also included operating expense charges of $875
               for corporate restructuring and consolidation of
               operations, and $891 for re-engineering costs and write-
               downs of assets in connection with the Company's
               implementation of a global information system.

               Corporate restructuring and consolidation of operations
               costs of $875 primarily includes work force reduction
               severance and facility closing/consolidation costs.
               June 30, 1998 employment of 1,559 was reduced to 1,360
               at December 31, 1998.  Facility-related costs relate to
               closing three manufacturing facilities and relocating
               manufacturing-related activities to other existing
               locations.  Two additional facilities are expected to be
               closed in 1999.  Expenditures will be funded with cash
               generated from operations and were $200 for work force
               reductions and $140 for facilities in 1998.


            18. Subsequent Event

               In February 1999, the Company entered into a Letter of
               Intent agreement to acquire all assets of another
               company.  Revenues of such company were less than $15
               million in 1998 and 1997.  Upon finalization, the
               acquisition will be recorded under the purchase method
               of accounting.


            INDEPENDENT AUDITORS' REPORT


            Osmonics, Inc. Board of Directors and Shareholders
            Minnetonka, Minnesota

            We have audited the accompanying consolidated balance sheets
            of Osmonicis, Inc. and Subsidiaries (the Company) as of
            December 31, 1998 and 1997 and the related consolidated
            statements of operations, changes in shareholders' equity,
            and cash flows for each of the three years in the period
            ended December 31, 1998.  These financial statements are the
            responsibility of the Company's management.  Our
            responsibility is to express an opinion on the financial
            statements based on our audits.

            We conducted our audits in accordance with generally
            accepted auditing standards.  Those standards require that
            we plan and perform the audit to obtain reasonable assurance
            about whether the financial statements are free of material
            misstatement.  An audit includes examining, on a test basis,
            evidence supporting the amounts and disclosures in the
            financial statements.  An audit also includes assessing the
            accounting principles used and significant estimates made by
            management, as well as evaluating the overall financial
            statement presentation.  We believe that our audits provide
            a reasonable basis for our opinion.

            In our opinion, the consolidated financial statements
            referred to above present fairly, in all material respects,
            the financial position of Osmonics, Inc. and Subsidiaries at
            December 31, 1998 and 1997 and the results of their
            operations and their cash flows for each of the three years
            in the period ending December 31, 1998, in conformity with
            generally accepted accounting principles.

            Deloitte and Touche LLP

            Minneapolis, Minnesota
            March 3, 1999




MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITIONS AND RESULTS OF OPERATIONS
(Dollars in thousands, except share data)


The following discussion should be read in conjunction with the Company's 
Consolidated Financial Statements and Notes included in this report.


RESULTS OF OPERATIONS:

The following table sets forth certain statements of operations data as a 
percentage of net sales for the periods indicated.


                            Years Ended December 31,       Increase (Decrease)
                                                            1998 vs    1997 vs
                              1998     1997     1996         1997       1996
                              ----     ----     ----         ----       ----
Net Sales                    100.0%   100.0%   100.0%         7.8%       5.7%
  Cost of goods sold          64.5     60.6     59.3         14.9        7.9
Gross profit                  35.5     39.4     40.7         (3.0)      13.0
  Selling, general and 
    administrative            24.5     24.0     22.5          9.8       12.9
  Research, development and
    engineering                5.6      6.4      7.0         (7.1)      (2.8)
  Special charges              4.5      0.9       -           N/A        N/A
Operating profit               1.0      8.1     11.2        (87.2)     (23.3)
  Other income/(expense)      (1.6)    (0.6)     1.5       (188.0)    (138.7)
  Recovery from discontinued
    operations                 -        0.8      -            N/A        N/A
  Income taxes                 -        2.4      4.1       (100.6)     (39.0)
Net income (loss)             (0.6)     5.9      8.6       (110.8)     (27.3)


COMPARISON OF YEARS ENDED DECEMBER 31, 1998 AND DECEMBER 31, 1997:

Net Sales for 1998 increased $12,914 or 7.8% to $177,819 as compared to net 
sales of $164,905 for 1997.  The 1998 sales increase was attributed to the 
acquisition of Micron Separations Inc. (MSI) during the first quarter of 1998
and Membrex Corp. during the second quarter of 1998.  Existing business sales
were essentially flat in 1998 due to slow sales of capital equipment, and of 
components sold to OEM customers.  Overall, sales slowed to customers in 
Asia/Pacific, and partially in the United States market.

Gross Profit decreased $1,944 or 3.0% to $63,101 as compared to $65,045 in 
1997.  As a percentage of net sales, gross profit decreased to 35.5% from 
39.4% in 1997.  1998 gross profit includes a $2,000 or 1.1% of net sales 
impact related to a second quarter special charge for slow moving inventory.
The decrease in gross profit is also due to lower utilization of certain 
production facilities and competitive pricing pressures.  In the third quarter
of 1998, the Company took action to reduce its manufacturing capacity and 
improve its gross margins.  Employment on June 30, 1998 of 1,559 was reduced
to 1,360 at December 31, 1998.  Three manufacturing facilities were closed by
December 31, 1998 and two additional facilities are expected to be closed in
1999. 

Selling, General and Administrative Expenses increased $3,884 or 9.8% to 
$43,487 in 1998 as compared to $39,603 in 1997.  As a percentage of sales, 
SG&A expenses increased to 24.5% from 24.0% in 1997.  The 1998 increase is 
attributed to costs of implementing a new enterprise resource planning (ERP)
system, costs related to the 1998 restructuring, and costs added in the 
acquisition of two companies in the first half of 1998.

The Company's marketing priority is to get its products into distribution as
soon as possible.  The Company has worked to centralize its sales groups to 
focus responsibility for customer relationships for all products through 
expanded local sales offices and to provide technical sales support from the
appropriate product manufacturing site.  In addition, the Company has invested
in a world wide web site.  The Company believes that these actions have 
enhanced customer service and will increase market penetration in the future;
however, in 1998 no significant sales benefit was achieved and marketing 
expenses increased.

Research, Development and Engineering Expenses decreased $722 or 6.8% to 
$9,913 in 1998, compared to $10,635 in 1997.  As a percentage of sales, the 
R&D expenses decreased to 5.6% from 6.4% in 1997.  The Company has worked to
centralize its R&D efforts and to eliminate any duplication of activity at 
different locations.  The Company believes the current level of funding may 
still be higher than required to support its product development priorities.

Special Charges of $9,988 ($7,569 net-of-tax or $0.54 per share assuming 
dilution) were recorded in the second quarter of 1998.  Charges included a 
$6,222 charge to operating expense for in-process research and development 
related to the acquisitions of Micron Separations, Inc. ($1,902) and Membrex 
Corp. ($4,320) and a $2,000 charge to cost of sales for slow moving inventory.
The special charges also included operating expense charges of $875 for 
corporate restructuring and consolidation of operations, and $891 for re-
engineering costs and write-downs of assets in connection with the Company's 
implementation of a global information system.  The special charges are 
summarized below:

    In-process R&D*                                  $6,222
    Corporate restructuring                             875
    SAP/Re-engineering costs                            891
    Slow moving inventory                             2,000
                                                     ------
        Gross special charges                        $9,988
        Less slow moving inventory - in COS          (2,000)
                                                     ------
        Special charge in Operating Expense          $7,988
                                                     ======

*See Note 2 - Business Acquisitions footnote for further analysis.


This compares to a special charge of $1,448 or 0.9% of sales ($0.07 per share
assuming dilution) in 1997.  These non-recurring charges were for the write-
offs of certain impaired assets and expenses related to recent acquisitions.

Other Income/(Expense) decreased $1,822 to $(2,791) in 1998, compared to 
$(969) in 1997.  The 1998 change is primarily the result of interest expense
of $1,300 and $950 on the additional borrowing of $20,000 and $18,000 for the
acquisitions of Micron Separations, Inc. during the first quarter of 1998 and
Membrex Corp. during the second quarter of 1998, respectively.

Recovery on Discontinued Operations of $1,330 (net of taxes) was recorded 
during 1997.  This gain of $0.09 per share assuming dilution resulted from the
reversal of a warranty reserve for discontinued operations, which was deemed
no longer necessary.

Income Taxes (Benefit) was $(25) in 1998.  The benefit is less than might be
anticipated due to the non-deductibility of the Micron Separations, Inc. in-
process R&D that was written off in the second quarter of 1998.  The 1997 
effective tax rate was 31.7%.

Net Income/(Loss) decreased $10,846 to a loss of $1,053 ($0.08 loss per share
assuming dilution) in 1998, compared to income of $9,793 ($0.68 per share 
assuming dilution) in 1997.  The current year net loss is due to second 
quarter special charges.  Without the special charges, 1998 net income would
have been $6,516 ($0.46 per share assuming dilution).


COMPARISON OF YEARS ENDED DECEMBER 31, 1997 AND DECEMBER 31, 1996:

Net Sales for 1997 increased $8,959 or 5.7% to $164,905 as compared to net 
sales of $155,946 for 1996.  The 1997 sales increase was attributed to the 
acquisition of AquaMatic during the first quarter of the year.  Existing 
business sales were relatively flat in 1997 due to a decline in large 
equipment sales both domestically and in Asian markets.  

Gross Profit increased $1,622 or 2.6% to $65,045 as compared to $63,423 in 
1996.  As a percentage of net sales, gross profit decreased to 39.4% from 
40.7% in 1996.  The reduction in gross profits for 1997 was due to a less 
favorable sales mix, more aggressive market pricing in certain product lines,
and a lower level of plant utilization at several locations.

Selling, General and Administrative Expenses increased $4,524 or 12.9% to 
$39,603 in 1997, compared to $35,079 in 1996.  As a percentage of sales, SG&A
expenses increased to 24.0% from 22.5% in 1996.  The 1997 increase is 
attributed to costs committed in anticipation of a higher level of sales which
did not materialize, and the ongoing implementation of a new integrated 
information system.  

The Company's marketing priority is to get its products into distribution as
soon as possible.  As a result of the Company's acquisitions, the Company 
inherited a number of separate sales forces selling individual products.  In
1996, the Company reorganized and centralized its sales groups to focus 
responsibility for customer relationships for all products through expanded 
local sales offices and to provide technical sales support from the 
appropriate product manufacturing site.  This reorganization resulted in some
increased costs in 1997; however, the Company believes these changes have 
enhanced customer service and will increase market penetration in the future.

Research, Development and Engineering Expenses decreased $302 or 2.8% to 
$10,635 in 1997, from $10,937 in 1996.  As a percentage of sales, R&D expenses
decreased to 6.4% from 7.0% in 1996.  The Company believes the current level 
of funding is adequate to support its product development priorities.

Special Charges of $1,448 or 0.9% of sales were recorded during the fourth 
quarter of 1997.  These non-recurring charges of $0.07 per share after taxes
assuming dilution were for the write-offs of certain impaired assets and 
expenses related to recent acquisitions.

Other Income/(Expense) decreased $3,470 to $(969) in 1997, compared to $2,501
in 1996.  The 1997 change is primarily due to lower gains on the sale of 
investments than in previous years, and the increased utilization of an 
existing line of credit for the acquisition of AquaMatic.

Recovery on Discontinued Operations of $1,330 (net of taxes) was recorded 
during 1997.  This gain of $0.09 per share assuming dilution resulted from the
reversal of a warranty reserve for discontinued operations, which was deemed 
no longer necessary.

Income Taxes (Benefit) effective tax rates for the years ended December 31, 1997
and 1996 were 31.7% and 32.4%, respectively.  The 1997 decrease in the effective
 tax rate is primarily due to an increased proportion of foreign sales and the 
extension of certain research-related tax credits.

Net Income (Loss) decreased $3,674 or 27.3% to $9,793 ($0.68 per share assuming
dilution) for 1997, compared to $13,467 ($0.93 per share assuming dilution) for
1996.  As a percentage of net sales, net income was 5.9% and 8.6% for 1997 and
1996, respectively.


LIQUIDITY AND CAPITAL RESOURCES:

At December 31, 1998, the Company had cash and marketable securities of 
$14,847 as compared to $21,876 at December 31, 1997.  The reduction in cash 
and marketable securities was primarily the result of investment maturities 
being utilized to help fund 1998 acquisitions and other investments in capital
assets.

Cash provided by operations was $8,102, $16,768, and $5,736 for the years 
ending December 31, 1998, 1997 and 1996, respectively.  The decrease in cash 
provided by operating activities during 1998 was principally due to increased
working capital requirements to support the manufacturing facilities acquired
in 1998.  The increase in cash provided by operating activities during 1997 
was principally due to the improved management of the inventory and accounts
receivable balances of the Company.

Capital expenditures for the years ending December 31, 1998, 1997 and 1996 
were $7,808, $6,609, and $15,658, respectively.  In 1998, the Company's 
capital expenditures were comparable to 1997 amounts and significantly lower 
in comparison to 1996 amounts.  The 1998 and 1997 lower level of capital 
expenditures is the result of the Company not incurring significant facility 
expansion and reconfiguration costs similar to those in 1996.

In 1998, the Company negotiated an increase in its unsecured revolving line of
credit to $35,000 for working capital needs and to help fund acquisitions.  
The revolving line of credit is for five years with a variable interest rate,
which is related to LIBOR.  The revolving line of credit replaced a $22,000 
line of credit.  At December 31, 1998, the Company had $9,000 available under
the revolving line of credit. 

In 1998, the Company entered into a new $20,000 long-term, ten-year loan from
an insurance company.  This loan contains $15,000 with a variable interest 
rate related to LIBOR and $5,000 which is fixed at 6.72%.  Interest is payable
quarterly.  The loan was obtained to finance the acquisition of Micron 
Separations, Inc. in 1998.

In March 1998, the Accounting Standards Executive Committee (AcSEC) of the 
American Institute of CPAs issued Statement of Position (SOP) 98-1, 
"Accounting for the Costs of Computer Software Developed or Obtained for 
Internal Use," which provides guidance on accounting for costs of internal-use
computer software.  The Company is in the process of evaluating the impact of
this statement.

Statement of Financial Accounting Standards ("SFAS") No. 133 "Accounting for
Derivative Instruments and Hedging Activities" was issued recently.  The 
Company anticipates no material impact on operating results or financial 
position.

The Company's operating cash requirements consist principally of working 
capital requirements, capital expenditures and scheduled payments of principal
on outstanding indebtedness.  The Company believes that its cash and 
marketable securities, cash flow from operating activities and borrowings 
under its bank facility will be adequate to meet the Company's liquidity and 
capital investment requirements in the foreseeable future.

The Company expects to continue to grow internally and through strategic 
acquisitions within the industry in which it operates.  As shown in the 
Supplementary Data, the Company has experienced significant long-term growth
in sales and financial position including the two acquisitions in the last 
five years accounted for as poolings.


MANAGEMENT'S DISCUSSION AND ANALYSIS OF IN-PROCESS R&D CHARGES:

The In-Process R&D acquired with the acquisition of Micron Separations, Inc. 
was determined to have a fair value of $1,902 based on the "Percent Complete"
method.  Out of nine ongoing projects there are three major programs involving
development of specialized membranes for microporous filtration, diagnostics 
and genetic research.

The first major project, judged to be 20% complete at acquisition, could 
result in a class of membranes that could replace a sole source product at 
approximately half the cost.  If successful, this will generate 5-10% margin 
improvement on products assembled with this membrane.  A patent has since been
applied for and the savings are expected to accrue in the third quarter of 
1999.

The second major project, 40% complete at acquisition, has also resulted in a
patent application.  This development allows the tailoring of membrane to 
provide unique surface characteristics for biotech, diagnostic and filtration
applications.  A patent disclosure has also been filed on results of a 
companion project, which successfully allows the treatment of certain 
membranes to ensure their utility in applications that require membrane 
wettability.  

The third major project, 50% complete at acquisition, resulted in a 
competitive membrane useful in genetic research and protein analysis.  It was
commercialized in late 1998.

The other six projects are expected to result in new or improved products and
an improved production process that will reduce product costs.  

No material changes from historical pricing, margin and expense levels are
anticipated.  A risk-adjusted discount rate of 18% was applied to the projected
cash flows to determine the fair value of the In-Process R&D.  Less than
$1 million of funding is projected to complete these projects, including
capital expenditures.

The fair value of the In-Process R&D acquired with Membrex was valued at 
$4,320 by the "Percent Complete" method.  Two products contributed to the 
total value:  (1) WasteWizard fluid separation units valued at $3,220, and (2)
Mini WasteWizard units valued at $1,100.

The WasteWizard unit is an ultrafiltration system used for recycling of 
various aqueous-based fluids including hard surface cleaners and metal cutting
fluids.  The new product could provide significant process cost savings by 
minimizing chemical usage and wastewater generation.  The Mini WasteWizard 
unit is a smaller version of the WasteWizard unit with a process capacity of 
less than 50 gallons per day.  Both products are protected by five U.S. 
patents with two U.S. patents pending.

At the time of the acquisition, the WasteWizard unit and Mini WasteWizard unit
were 85% and 50% complete, respectively.  The WasteWizard unit is scheduled to
be completed and introduced in the second quarter of 1999.  The Mini 
WasteWizard unit is scheduled for field trials through the fourth quarter of 
1999 and market introduction in the first quarter of 2000.  Less than $1 
million of funding is projected to complete these projects, including capital
expenditures for molds and other tooling.

No material changes from historical pricing, margin and expense levels are 
anticipated.  A risk-adjusted discount rate of 20% was applied to the 
projected cash flows to determine the fair value of the In-Process R&D.  


REVIEW OF INDUSTRY SEGMENTS:

As discussed in Note 13 to the consolidated financial statements, the Company
established a five-unit marketing structure on July 1, 1998.  These marketing
units are made up of related product lines.  In accordance with Statement of 
Financial Standards (SFAS No. 131), these five marketing units have been 
aggregated into two reportable business segments - "Consumables" and 
"Equipment."  Comparable information is not available for the two reportable 
business segments for prior periods.  

                            Consumables       Equipment      Consolidated Total
                            -----------       ---------      ------------------
Sales                         $36,631          $51,685             $88,316
Cost of sales                  22,342           34,425              56,767
                               ------           ------              ------
Gross profit                   14,289           17,260              31,549
  Gross margin %                 39.0%            33.4%               35.7%
Operating expenses             11,431           16,741              28,172
                               ------           ------              ------
Operating income              $ 2,858          $   519             $ 3,377

Sales by United States operations to unaffiliated customers in foreign 
geographic areas are as follows:

                                         Year ended December 31,
                                     1998         1997         1996
                                     ----         ----         ----
Asia/Pacific                      $15,967      $20,030      $14,661
Euro/Africa                        17,710       14,536        9,181
Americas                           11,227       11,678        9,222
                                  -------      -------      -------
                                  $44,904      $46,244      $33,064

Total international sales for the Company were as follows:
1998 - $58,815; 1997 - $60,396; and 1996 - $47,886.

Due to lower plant utilization, pricing pressures and slow sales in 
Asia/Pacific, the gross margin and operating income for Equipment was less 
than Consumables.  The standard equipment marketing unit is the only marketing
unit which incurred an operating loss for the six-month period ended December
31, 1998.  This loss of $(1.4) million was principally due to lower 
utilization of certain production facilities and costs incurred related to the
products acquired in the Membrex acquisition.

The products acquired in the MSI acquisition are included in the "Consumables"
segment and were additive to earnings in 1998.  The products acquired in the 
Membrex acquisition are included in the "Equipment" segment and were dilutive
to earnings in 1998.  The net impact of these acquisitions on 1998 results was
approximately a $(0.03) per share loss.  Both acquisitions are expected to be
additive to earnings in 1999.  


YEAR 2000 READINESS DISCLOSURE:

STATE OF READINESS

The Company is currently working to fully determine and resolve the potential 
impact of the Year 2000 on the processing of date-sensitive information by its
computerized information systems.  The Year 2000 problem is the result of 
computer programs being written using two digits (rather than four) to define
the applicable year.  Any of the Company's programs that have time-sensitive
software may recognize a date using "00" as the year 1900 rather than the 
Year 2000, which could result in miscalculations or system failures.

The Company's Year 2000 Project (the Project) began in 1994 with reviews of 
the Company's business information systems.  The objective was to improve 
access to business information through an integrated, company-wide system 
which is also Year 2000 compliant.  

The Company is using a multi-step approach in conducting the Project.  These 
steps include:  needs analysis, resource requirements, remediation, testing, 
and implementation.  The Project plan identified the major issues and 
alignment of priorities, resources, and contingency plans.  The remediation 
and testing phases will continue through third quarter of 1999.

The Project scope includes all computing systems hardware, software, 
information technology (IT) infrastructure (such as networks and 
telecommunications), and all third-party suppliers and vendors.  The Company
has completed the needs analysis phase of the Project.  The Company has not 
yet completed, corrected and/or tested for all possible Year 2000 compliance
issues.  The Company is utilizing the services of consulting firms to assist
in dealing with Year 2000 issues.

An integral part of the Project is the implementation of SAP, a company-wide
integrated business information and accounting system.  The Company began 
implementing SAP as its primary information system in 1996.   SAP is being 
implemented in a two-phase approach.  Phase I, the conversion of the previous
primary computing system at the Company's headquarters and primary 
manufacturing facility in Minnetonka, MN was completed in 1997.  Phase II is
the business process re-engineering within SAP, and the rollout to other 
plants.  The existing software at three other plants has also been upgraded 
with Year 2000 compliant versions on an interim basis.  As of December 31, 
1998, the Company is approximately 75% complete on converting or upgrading its
systems to be Year 2000 compliant.  The remaining three plants are scheduled 
to be completed by September 30, 1999. 

Very few of the Company's products contain software or embedded 
microprocessors.  The Company has reviewed all of these products and 
identified only a few that will be impacted by the year 2000.  In all cases, 
the effect will be in the retrieval and display of logged data and not in the
correct operation of the product.  A solution for each of the products 
identified has either been made available, or will be made available to our 
customers prior to the year 2000.

Customers and vendors could be disrupted with their own Year 2000 issues, 
which could affect their ability to buy products or supply the Company with 
raw materials.  However, the Company believes this is unlikely, since no 
single customer or vendor represents more than 5 percent of the Company's 
present business.  Alternative sources of supply are also currently available
and the Company believes will be available if needed.  The Company is in the 
process of seeking assurances from its material suppliers that their ability 
to sell to the Company will not be materially impacted by any Year 2000 issue.
The Company does not at this time see the need to develop additional 
contingency plans to deal with this aspect of the Year 2000 problem.


COST

As of December 31, 1998, the Company has invested over $5,000 during the years
1995-1998 to upgrade its information systems.  The remaining cost associated 
with required modifications to become Year 2000 compliant is not expected to 
be material to the Company's financial position.  The estimated total external
cost to accelerate the replacement of certain hardware, software, and 
infrastructure is not expected to exceed $500.  The remaining SAP 
implementation costs and the related business process improvements, which 
would be incurred in any case, are excluded from the figure above.


RISKS

Although the Company believes that it will be able to correct all material 
Year 2000 problems prior to January 1, 2000, the failure to correct a material
Year 2000 problem could result in an interruption in, or a failure of, certain
normal business activities or operations.  Such interruptions or failures 
could materially and adversely affect the Company's results of operations and
financial condition.  For example, the failure to update its business 
information system could result in delayed performance on contracts, loss of 
contracts, or lawsuits for failure to perform.

The Project is expected to significantly reduce the Company's level of 
uncertainty regarding the Year 2000 problem.  The Company believes that, with
the implementation of new business systems and completion of the Project as 
scheduled, the possibility of significant interruptions of normal operations
should be minimized.

The failure of the Company's customers to be Year 2000 compliant could 
materially reduce or delay the Company's sale of water systems because of 
budget constraints and the diversion of customer resources to fixing the 
customers' Year 2000 problems.  At this time, the Company does not believe 
that its customers' Year 2000 problems will materially impact the Company's 
business.

Readers are cautioned that forward-looking statements contained in this Year
2000 readiness disclosure should be read in conjunction with the Company's 
disclosures under the heading - "Private Securities Litigation Reform Act" -
that follows.


CONTINGENCY PLANS

The Company has developed and put in place contingency plans to address 
internal and external issues specific to the Year 2000 problem, to the extent
practicable.  The Company believes that due to the widespread nature of 
potential Year 2000 issues, the contingency planning process may require 
further modifications as the Company obtains additional information regarding:
(1) the Company's internal systems and equipment during the remediation and 
testing phases of its Year 2000 program; and (2) the status of third party 
Year 2000 readiness.


PRIVATE SECURITIES LITIGATION REFORM ACT

The Private Securities Litigation Reform Act provides a "safe harbor" for 
forward-looking statements.  Certain information included in this Annual Report
and other materials filed or to be filed with the Securities and Exchange 
Commission (as well as information included in statements made or to be made by
the Company) contains statements that are forward-looking.  Such statements may
relate to plans for future expansion, business development activities, capital
spending, financing, or the effects of regulation, competition and Year 2000
compliance.  Such information involves important risks and uncertainties that
could significantly affect results in the future.  Such results may differ from
those expressed in any forward-looking statements made by the Company.  These
risks and uncertainties include, but are not limited to, those relating to
product development, computer systems development, dependence on existing
management, global economic and market conditions, and changes in federal or
state laws.




SUBSIDIARIES OF OSMONICS, INC.

Percentage
Ownership

  100%     VAPONICS, INC.                     A Massachusetts Corp.

  100%     PORETICS CORPORATION               A Delaware Corporation

  100%     OSMONICS ASIA/PACIFIC LTD.         A Kong Kong Corporation

  100%     OSMONICS EUROPA, S.A.              A Switzerland Corp.

  100%     OZONE RESEARCH & EQUIPMENT CORP.   An Arizona Corporation

  100%     GHIA, INC.                         A Nevada Corporation

  100%     AUTOTROL CORPORATION               A Wisconsin Corporation

  100%     NIPPON OSMONICS LTD.               A Japan Corporation

  100%     AUTOTROL S.A.                      A France Corporation

  100%     OSMONICS INTL SALES CORP.          A Virgin Islands Corp.

  100%     MICROL SYSTEMS, LTD.               An England Corporation

  100%     DESALINATION SYSTEMS, INC.         A California Corp.

   50%     NIPPON AUTOTROL K.K.               A Japan Corporation

  100%     AQUAMATIC, INC.                    A Delaware Corporation

  100%     MEMBREX, INC.                      A Delaware Corporation

  100%     MICRON SEPARATIONS, INC.           A New York Corporation

  100%     MICRON SEPARATIONS
           INTERNATIONAL, INC.                A Virgin Islands Corp.




INDEPENDENT AUDITORS CONSENT

Osmonics, Inc.

We consent to the incorporation by reference in Registration Statements
No. 33-25228 and No. 33-537 of Osmonics, Inc. on Form S-8 and Registration
Statement No. 33-05029 filed on Form S-3 of our reports dated March 3, 1999
appearing and incorporated by reference in this Annual Report on Form 10-K 
of Osmonics, Inc. for the year ended December 31, 1998.


DELOITTE AND TOUCHE LLP


Minneapolis, Minnesota
March 30, 1999



<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Form 10-K
for the year ended December 31, 1998 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                             576
<SECURITIES>                                    14,271
<RECEIVABLES>                                   35,824
<ALLOWANCES>                                     1,057
<INVENTORY>                                     28,123
<CURRENT-ASSETS>                                89,381
<PP&E>                                         105,684
<DEPRECIATION>                                  48,871
<TOTAL-ASSETS>                                 194,049
<CURRENT-LIABILITIES>                           55,405
<BONDS>                                         31,665
                                0
                                          0
<COMMON>                                           140
<OTHER-SE>                                     102,015
<TOTAL-LIABILITY-AND-EQUITY>                   194,049
<SALES>                                        177,819
<TOTAL-REVENUES>                               177,819
<CGS>                                          114,718
<TOTAL-COSTS>                                  114,718
<OTHER-EXPENSES>                                61,388
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               4,288
<INCOME-PRETAX>                                (1,078)
<INCOME-TAX>                                      (25)
<INCOME-CONTINUING>                            (1,053)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (1,053)
<EPS-PRIMARY>                                  ($0.08)
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</TABLE>

                             OSMONICS, INC.
                  VALUATION AND QUALIFYING ACCOUNTS
                             (In thousands)

              Years Ended December 31, 1998, 1997 and 1996

        Column A       Column B        Column C      Column D  Column E

                                      Additions
                       Balance     Charged  Charged              Balance
                          At         to       to                   at
                       Beginning  Cost and   Other     Deduct-    End of
      Description      of Period  Expensed  Accounts   tions      Period
    ---------------    ---------  --------  --------   ------     ------

Year Ended
  December 31, 1998:
Current Operations:
  Allowance for
    Doubtful Accounts    $  888     $  502    $  153   $ 486(A)   $1,057
  Warranty and Start-
    Up Reserve           $1,900     $2,046        -   $1,848(B)   $2,098


Year Ended
  December 31, 1997:
Current Operations:
  Allowance for
    Doubtful Accounts    $  907      $ 139            $  158(A)   $  888
  Warranty and Start-
    Up Reserve           $1,802     $2,343            $2,245(B)   $1,900

Discontinued Operations:
  Warranty Reserve       $1,957                       $1,957(D)      - 

Year Ended
  December 31, 1996:
Current Operations:
  Allowance for
    Doubtful Accounts    $1,177      $  59            $  329(A)   $  907
  Warranty and Start-
    Up Reserve           $1,868     $2,414            $2,480(B)   $1,802

Discontinued Operations:
  Warranty Reserve       $1,957                                   $1,957


(A)  Uncollectible accounts charged against allowance.
(B)  Actual warranty claims and start-up costs charged against reserve.
(C)  Addition due to acquisition.
(D)  Company determined that the reserve was no longer required.



INDEPENDENT AUDITORS REPORT

Osmonics, Inc.

We have audited the consolidated financial statements of Osmonics, Inc. (the
Company) as of December 31, 1998 and 1997 and for each of the three years in
the period ended December 31, 1998 and have issued our report thereon dated
March 3, 1999.  Such financial statements and reports are included in the
Company's 1998 Annual Report to Shareholders and are incorporated herein by
reference.  Our audits also included the financial statement schedule of the
Company, listed in Item 14.  This financial statement schedule is the
responsibility of the Company's management.  Our responsibilty is to express
an opinion based on our audits.  In our opinion, such financial statement
schedule, when considered in relation to the basic financial statements taken
as a whole, presents fairly, in all material aspects, the information set forth
therein.


DELOITTE AND TOUCHE LLP


Minneapolis, Minnesota
March 30, 1999




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