HACH CO
PRE 14A, 1996-07-12
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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<PAGE>
                            SCHEDULE 14A INFORMATION
 
                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )
 
    Filed by the Registrant /X/
    Filed by a Party other than the Registrant / /
 
    Check the appropriate box:
    /X/  Preliminary Proxy Statement
    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14a-6(e)(2))
    / /  Definitive Proxy Statement
    / /  Definitive Additional Materials
    / /  Soliciting  Material  Pursuant  to  Section  240.14a-11(c)  or  Section
         240.14a-12
 
                                             HACH COMPANY
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)
 
                                             HACH COMPANY
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
/X/  $125 per  Exchange Act  Rules 0-11(c)(1)(ii),  14a-6(i)(1), 14a-6(i)(2)  or
     Item 22(a)(2) of Schedule 14A.
/ /  $500  per  each party  to  the controversy  pursuant  to Exchange  Act Rule
     14a-6(i)(3).
/ /  Fee  computed  on   table  below   per  Exchange   Act  Rules   14a-6(i)(4)
     and 0-11.
     1) Title of each class of securities to which transaction applies:
        ------------------------------------------------------------------------
     2) Aggregate number of securities to which transaction applies:
        ------------------------------------------------------------------------
     3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
        filing fee is calculated and state how it was determined):
        ------------------------------------------------------------------------
     4) Proposed maximum aggregate value of transaction:
        ------------------------------------------------------------------------
     5) Total fee paid:
        ------------------------------------------------------------------------
/ /  Fee paid previously with preliminary materials.
/ /  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2)  and identify the  filing for which the  offsetting fee was paid
     previously. Identify the previous filing by registration statement  number,
     or the Form or Schedule and the date of its filing.
     1) Amount Previously Paid:
        ------------------------------------------------------------------------
     2) Form, Schedule or Registration Statement No.:
        ------------------------------------------------------------------------
     3) Filing Party:
        ------------------------------------------------------------------------
     4) Date Filed:
        ------------------------------------------------------------------------
<PAGE>
                                                            DRAFT: July 12, 1996
 
                                     [LOGO]
 
                                  HACH COMPANY
                              5600 Lindbergh Drive
                            Loveland, Colorado 80539
                             ---------------------
 
                            NOTICE OF ANNUAL MEETING
 
To the Stockholders:
 
    The  Annual  Meeting  of  the  Stockholders  of  HACH  COMPANY,  a  Delaware
corporation, will be held on Tuesday, August 27, 1996, at 2:00 p.m. local  time,
at  the Company's principal  executive offices located  at 5600 Lindbergh Drive,
Loveland, Colorado, for the following purposes:
 
    1.  To elect a Board of seven directors.
 
    2.   To  consider and  act  upon a  proposal  to amend  the  Certificate  of
       Incorporation of the Company to reduce the number of authorized shares of
       Common Stock from 40,000,000 to 25,000,000.
 
    3.    To consider  and act  upon a  proposal to  approve the  Company's 1995
       Non-Employee Director Stock Plan.
 
    4.  To transact such other business  as may lawfully come before the  Annual
       Meeting or any adjournments thereof.
 
    The Board of Directors has fixed July 10, 1996, at the close of business, as
the record date for the determination of stockholders entitled to receive notice
of  and  to  vote at  this  Annual  Meeting, or  any  adjournments  thereof. All
stockholders are urged to attend the meeting. In order to assure the presence of
a quorum, whether you expect to be present personally or not, please sign,  date
and  mail immediately the enclosed proxy, since you have full power to revoke it
at any time before it is exercised.
 
                                          By Order of the Board of Directors,
 
                                          ROBERT O. CASE, SECRETARY
 
July 22, 1996
<PAGE>
                                  HACH COMPANY
 
                              5600 Lindbergh Drive
                            Loveland, Colorado 80539
 
                            ------------------------
 
                                PROXY STATEMENT
                                      FOR
                         ANNUAL MEETING OF STOCKHOLDERS
 
                           To Be Held August 27, 1996
 
    This  proxy statement  is furnished in  connection with  the solicitation of
proxies by the Board of Directors of Hach Company (the "Company") to be voted at
the Annual Meeting of Stockholders to be held on August 27, 1996, and at any and
all adjournments thereof.  All proxies  received pursuant  to this  solicitation
will  be voted, but stockholders who execute proxies may revoke them at any time
before they are voted by giving written  notice to the Secretary of the  Company
or by voting in person at the meeting. This proxy statement and the accompanying
proxy are being first mailed to stockholders on or about July 22, 1996.
 
    Only  stockholders of record at the close of business on July 10, 1996, will
be entitled to vote at  the meeting. On that  date, the Company had  outstanding
_______ shares of common stock entitled to vote at the meeting, each share being
entitled to one vote.
 
                                VOTING OF SHARES
 
    Shares  voted as abstentions on any matter (or a "withhold authority to vote
for" as to directors) will be counted as shares that are present and entitled to
vote for purposes  of determining the  presence or  absence of a  quorum at  the
meeting  and as unvoted, although present and  entitled to vote, for purposes of
determining the  approval  of  each  matter as  to  which  the  shareholder  has
abstained.  If a broker submits a proxy  that indicates the broker does not have
discretionary authority as  to certain shares  to vote on  one or more  matters,
those shares will be counted as shares that are present and entitled to vote for
purposes  of determining the presence or absence of a quorum at the meeting, but
will not be  considered as present  and entitled  to vote with  respect to  such
matters.
 
    An  affirmative vote of the holders of a  plurality of the votes cast at the
meeting is required for  the election of directors.  An affirmative vote of  the
holders  of a majority  of the shares  present or represented  at the meeting is
required for the approval of each of the other matters to be voted upon.
 
                                       2
<PAGE>
                    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL
                             OWNERS AND MANAGEMENT
 
    The following table  sets forth, as  of June 30,  1996, certain  information
with respect to each person who is known to the Company to own beneficially more
than  5% of the  outstanding voting securities of  the Company. This information
has been furnished by such persons to the Company.
 
<TABLE>
<CAPTION>
 TITLE OF                                                                        BENEFICIALLY    PERCENT OF
   CLASS                   NAME AND ADDRESS OF BENEFICIAL OWNER                      OWNED          CLASS
- -----------  -----------------------------------------------------------------  ---------------  -----------
<S>          <C>                                                                <C>              <C>
Common       Kathryn Hach-Darrow .............................................     4,613,926(1)      40.65%
              Hach Company
              5600 Lindbergh Drive
              Loveland, Colorado 80537
Common       Lawter International, Inc. ......................................     3,157,220         27.81%
              990 Skokie Boulevard
              Northbrook, Illinois 60062
Common       Hach Company Employee Stock                                             679,155(2)       5.98%
              Ownership Plan and Trust........................................
             Hach Company
              5600 Lindbergh Drive
              Loveland, Colorado 80537
</TABLE>
 
    The following table  shows the amount  of voting securities  of the  Company
beneficially  owned by all officers and directors  of the Company as a group (14
persons) on June 30, 1996.
 
<TABLE>
<CAPTION>
TITLE OF                                                            BENEFICIALLY    PERCENT OF
CLASS                                                                   OWNED          CLASS
- -----------------------------------------------------------------  ---------------  -----------
<S>                                                                <C>              <C>
Common...........................................................     5,007,714(3)      44.12%
</TABLE>
 
- ------------------------
 
(1) The shares  listed in the  table above opposite  Kathryn Hach-Darrow's  name
    include  942,962 shares held  in Mrs. Hach-Darrow's  name. The shares listed
    above also include 1,869,743 shares held by Mrs. Hach-Darrow as trustee  and
    beneficiary of the Kathryn C. Hach Marital Trust, 95,176 shares held by Mrs.
    Hach-Darrow  as  the  trustee  and  beneficiary  of  the  Clifford  C.  Hach
    Generation Skipping Trust, and  73,635 shares held by  the Clifford C.  Hach
    Family  Trust, all  three of  which Trusts  were created  under an agreement
    dated August 30, 1988, by Clifford  C. Hach. Mrs. Hach-Darrow has the  power
    to  vote and dispose of the shares  held in the Marital, Generation Skipping
    and Family  Trusts.  In addition,  the  shares listed  above  opposite  Mrs.
    Hach-Darrow's  name include 1,511,415 shares owned by C&K Enterprises, Ltd.,
    as to which  Mrs. Hach-Darrow  and the Kathryn  C. Hach  Marital Trust  have
    voting  and  investment  powers,  and  120,782  shares  owned  by  the  Hach
    Scientific  Foundation,  a  charitable   foundation.  Mrs.  Hach-Darrow   is
    President  and  a co-trustee  of the  Foundation and  she shares  voting and
    investment powers  with  respect  to  the shares  held  by  the  Foundation.
    Finally,  the  shares  listed  above  include  213  shares  which  have been
    allocated to the account  of Mrs. Hach-Darrow  under the Company's  Employee
    Stock  Ownership Plan (the "ESOP") and  which Mrs. Hach-Darrow has the right
    to direct the Plan trustee to vote.
 
(2) These shares are  allocated to the accounts  of the individual employees  of
    Hach  Company who are  participants in the  ESOP, and who  have the power to
    vote the shares. The Trustees and the Company have investment power over the
    stock held in the Plan.
 
(3) Includes the shares listed in the table above opposite Kathryn Hach-Darrow's
    name. Excludes (i) 101,272 shares held by the Company's 401(k) Plan for  the
    individual  accounts of employees  other than officers  and directors of the
    Company, (ii) 651,429 shares held by the Company's ESOP, which are allocated
    to the individual accounts of employees other than officers or directors  of
    the
 
                                       3
<PAGE>
    Company, (iii) 285,094 shares referred to in footnote 3 and the aggregate of
    20,000  shares referred  to in  footnote 5  to the  table below  listing the
    shares beneficially owned by the directors, and (iv) 99,047 shares held by a
    partnership composed of  the children  of Kathryn Hach-Darrow  and the  late
    Clifford C. Hach and their spouses, as to which Bruce J. Hach, the President
    and  a Director of the Company, is a  partner. If all the shares referred to
    in the preceding sentence  were included, the  shares beneficially owned  by
    officers  and directors as a group would be 6,164,556 and the percent of the
    class would be 54.13%.
 
                             ELECTION OF DIRECTORS
 
    At the meeting seven directors  are to be elected  to hold office until  the
next  annual meeting and until their successors have been elected and qualified.
It is the intention of the persons  named in the enclosed form of proxy,  unless
the  stockholder  otherwise  specifies  therein, to  vote  for  the  election as
directors of the  persons named in  the table  below. In case  any such  nominee
should  be unavailable for  any reason, the  proxy holders reserve  the right to
substitute another  person  of  their  choice  in  his  place.  The  information
concerning  the nominees and their security  holdings has been furnished by them
to the Company.
 
<TABLE>
<CAPTION>
                                                                                                  COMMON STOCK BENEFICIALLY
                                                                                                    OWNED ON JUNE 30, 1996
                                                                                                 ----------------------------
                                             PRINCIPAL OCCUPATION AND OTHER          DIRECTOR                      PERCENT OF
NAME                          AGE                     DIRECTORSHIPS                    SINCE     NUMBER OF SHARES    CLASS
- ------------------------      ---      -------------------------------------------  -----------  ----------------  ----------
<S>                       <C>          <C>                                          <C>          <C>               <C>
Kathryn Hach-Darrow               73   Chairman of the  Board and Chief  Executive        1951     4,613,926(1)(2)     40.65%
                                       Officer  of the Company  since August 1988;
                                       other executive  offices  of  the  Company,
                                       including  President  and  Chief  Operating
                                       Officer for  more  than  the  previous  two
                                       years.
Bruce J. Hach                     50   President  and  Chief Operating  Officer of        1987       160,673(2)(3)      1.42%
                                       the Company since August 1988; a member  of
                                       senior  management of the  Company for more
                                       than the previous two years.
Gary R. Dreher                    43   Vice President and Chief Financial  Officer        1994        35,297(2)(4)     *
                                       since  November  1994;  Vice  President and
                                       Treasurer of the  Company from August  1991
                                       through  November 1994;  Vice President and
                                       Controller of the Company from August  1990
                                       through  August,  1991;  Controller  of the
                                       Company from September 1985 through  August
                                       1990.
Joseph V. Schwan                  59   Senior  Vice President and General Manager,        1987        17,237(2)(5)     *
                                       Forms Division  of  the  Standard  Register
                                       Company;  Vice  President,  Forms Marketing
                                       and Sales of The Standard Register  Company
                                       (a publicly-held manufacturer and
                                       distributor of business forms) since August
                                       1991;   Vice  President-Forms  Division  of
                                       Rittenhouse,  Inc.,  from  March  1990   to
                                       August  1991; a member of senior management
                                       of Wallace Computer Services (a
                                       publicly-held computer services and  supply
                                       company) for the three previous years.
</TABLE>
 
                                       4
<PAGE>
<TABLE>
<CAPTION>
                                                                                                  COMMON STOCK BENEFICIALLY
                                                                                                    OWNED ON JUNE 30, 1996
                                                                                                 ----------------------------
                                             PRINCIPAL OCCUPATION AND OTHER          DIRECTOR                      PERCENT OF
NAME                          AGE                     DIRECTORSHIPS                    SINCE     NUMBER OF SHARES    CLASS
- ------------------------      ---      -------------------------------------------  -----------  ----------------  ----------
Fred W. Wenninger                 57   President  and Chief Executive Officer, Key        1990           -0-(2)(5)     *
                                       Tronic   Corporation    (a    publicly-held
                                       manufacturer  of computer  keyboards) since
                                       September 1, 1995; Independent businessman,
                                       from  January  1994  through  August  1995;
                                       President,   Chief  Executive  Officer  and
                                       Director, Iomega  Corporation  (a  publicly
                                       held manufacturer of removable mass storage
                                       products   for  computers)  from  May  1989
                                       through December 1993; President of  Allied
                                       Signal,    Inc.'s    Bendix/King   Avionics
                                       division from 1986 to 1989.
<S>                       <C>          <C>                                          <C>          <C>               <C>
John N. McConnell                 57   Chairman   and   President   of    Labconco        1990         7,457(2)(5)     *
                                       Corporation    (a    laboratory   equipment
                                       manufacturer)  since  1990;  President   of
                                       Labconco since 1981.
Linda O. Doty                     46   Certified  Public  Accountant,  partner  in        1991         8,343        (5)     *
                                       Doty   &   Associates,   Certified   Public
                                       Accountants,  since  January  1,  1990; tax
                                       partner with  Coopers  & Lybrand  for  more
                                       than the previous three years.
</TABLE>
 
- --------------------------
 
 *  Less than 1%.
 
(1)  The shares  listed in the  table above opposite  Kathryn Hach-Darrow's name
    include 942,962  shares held  in  her name.  The  shares listed  above  also
    include 1,869,743 shares held by Mrs. Hach-Darrow as trustee and beneficiary
    of the Kathryn C. Hach Marital Trust, 95,176 shares held by Mrs. Hach-Darrow
    as  the trustee and beneficiary of  the Clifford C. Hach Generation Skipping
    Trust, and 73,635  shares held  by the Clifford  C. Hach  Family Trust,  all
    three of which Trusts were created under an agreement dated August 30, 1988,
    by  Clifford C. Hach. Mrs. Hach-Darrow has  the power to vote and dispose of
    the shares held in  the Marital, Generation Skipping  and Family Trusts.  In
    addition,  the shares listed above  opposite Mrs. Hach-Darrow's name include
    1,511,415  shares  owned  by  C&K  Enterprises,  Ltd.,  as  to  which   Mrs.
    Hach-Darrow and the Kathryn C. Hach Marital Trust have voting and investment
    powers,  and  120,782  shares owned  by  the Hach  Scientific  Foundation, a
    charitable foundation. Mrs. Hach-Darrow is President and a co-trustee of the
    Foundation and she shares voting and  investment powers with respect to  the
    shares  held by the Foundation. Finally, the shares listed above include 213
    shares which have been  allocated to the account  of Mrs. Hach-Darrow  under
    the Company's Employee Stock Ownership Plan and Trust (the "ESOP") and which
    Mrs. Hach-Darrow has the right to direct the ESOP trustee to vote.
 
(2)  Excludes 104,525 shares owned by the  Hach Company 401(k) Plan. The Company
    through its  board  of directors  has  the power  to  vote such  shares.  In
    addition,  the co-trustees  of the 401(k)  Plan share  investment power with
    respect to those shares. Also excludes  shares of the Company's ESOP, as  to
    which   the  Company  through  its  Board   of  Directors,  and  the  ESOP's
    co-trustees, have investment power.  The co-trustees of  each of the  401(k)
    Plan  and  the ESOP  are Randall  A. Petersen,  Gary R.  Dreher and  Loel J.
    Sirovy. The ESOP as of June 30, 1996  held a total of 679,155 shares all  of
    which were allocated to the accounts of plan participants. Shares accrued to
    the  individual accounts of Kathryn Hach-Darrow,  Bruce Hach and Gary Dreher
    are reflected in the table above and the amounts of the shares being held in
    said individual accounts are  given in footnotes  1, 3, and  4 to the  above
    table.  See footnote  2, page 3,  with reference  to the power  to vote ESOP
    shares.
 
(3) Excludes  64,644  shares  held by  Robert  O.  Case and  Bruce  J.  Hach  as
    co-trustees of eight irrevocable trusts for the benefit of the grandchildren
    of  Kathryn  Hach-Darrow.  Robert O.  Case  and  Bruce J.  Hach  have shared
    investment and voting  powers with  respect to  those shares.  Three of  the
    beneficiaries of the trusts are the children of Bruce J. Hach. Also excludes
    220,450  shares  held in  separate shares  in an  irrevocable trust  for the
    benefit of the grandchildren of Kathryn  Hach-Darrow by Bank One -  Loveland
    under  an agreement dated June 30, 1975, between Kathryn Hach-Darrow and the
    late Clifford C. Hach as settlors, and The Northern
 
                                       5
<PAGE>
    Trust Company, as initial trustee. The  Trust is being held for the  benefit
    of  the grandchildren of Kathryn Hach-Darrow  and the late Clifford C. Hach,
    three of whom are the children of Bruce J. Hach. Also excludes 99,047 shares
    held by a partnership  composed of the children  of Kathryn Hach-Darrow  and
    their  spouses. Includes 5,012 shares held by  the ESOP which are accrued to
    the account of Bruce J. Hach and which  he has the right to direct the  Plan
    trustee to vote, and options to purchase 6,667 shares of stock.
 
(4)  Includes 3,461 shares held by the ESOP  which are accrued to the account of
    Mr. Dreher and which he  has the right to direct  the Plan trustee to  vote,
    and  options  to purchase  16,667 shares  of  stock. Excludes  an additional
    675,694 shares owned by the ESOP, for  which Gary R. Dreher as a  co-trustee
    of the ESOP shares investment power.
 
(5)  Excludes an option to  purchase 5,000 shares issued  to this director under
    the Director Stock Plan, which is subject to the approval of the plan by the
    shareholders of the Company at this Annual Meeting.
 
    Kathryn Hach-Darrow may  be considered  to be  a controlling  person of  the
Company. Kathryn Hach-Darrow is the mother of Bruce J. Hach. Jerry M. Churchill,
56,  chose  not to  stand for  reelection as  a Director  at last  year's Annual
Meeting of Shareholders held August 29, 1995. Mr. Churchill had been a  director
of  the Company since 1990. During the prior 5 years Mr. Churchill has served as
an officer of the Company and currently serves as Vice President, Domestic Sales
of the Company. Mr. Churchill beneficially owned 32,333 shares of the  Company's
common  stock as of June  30, 1996 (subject to the  disclosures in footnote 2 to
the above table).
 
    The Board of Directors has an Audit Committee, an Executive Committee and  a
Compensation Committee, but does not have a nominating committee. The members of
the  Audit Committee  are Linda  O. Doty  and Joseph  V. Schwan.  There were two
meetings of the Audit Committee during the last fiscal year. The Audit Committee
oversees implementation  of  the  Company's financial  and  accounting  systems,
recommends  the  appointment of  the independent  auditors  for the  Company and
reviews the adequacy and scope of the auditor's examination.
 
    The Compensation Committee, which is  composed of Kathryn Hach-Darrow,  John
N.  McConnell (Chairman), Joseph  V. Schwan and  Linda O. Doty,  met on four (4)
occasions during the last fiscal year. The Compensation Committee consults  with
management  and makes  recommendations to  the Board  of Directors  as to annual
compensation of, and the award of stock options to, key personnel and such other
compensation matters as may be delegated to it by the Board of Directors.
 
    The members of the Executive  Committee are Kathryn Hach-Darrow  (Chairman),
Bruce J. Hach and Fred J. Wenninger. The Executive Committee acts in lieu of the
Board  of Directors, when necessary, on  matters which require the authorization
of the Board of Directors and are  within the Committee's powers as provided  by
statute,  the Company's by-laws  and Board resolutions.  The Executive Committee
met once during the last fiscal year.
 
    The Board of  Directors met  seven (7) times  during the  last fiscal  year.
During fiscal 1996, all incumbent directors of the Company attended at least 75%
of  the  total number  of meetings  of the  Board of  Directors and  meetings of
committees of which they were members.
 
    DIRECTOR REMUNERATION.  Prior  to November 21, 1995,  the Company paid  each
director  who  is not  also  an employee  of the  Company  (each such  person, a
"Non-Employee Director" ) for his or her  services as a director at the rate  of
$3,750 per year, plus $750 per each board meeting attended in excess of five per
year, and at its option, $750 for each meeting of a board committee attended, by
a  director. Effective  November 21,  1995, the  Company pays  each Non-Employee
Director for his or her services as a director an annual retainer of $10,000  on
the  last day of the Company's fiscal  year, together with $1,000 for each board
meeting and  $750  for  each  board committee  meeting  which  the  Non-Employee
Director  attends in person.  Attendance at telephonic  board or board committee
meetings is not compensated. Directors who  are employees of the Company do  not
receive fees for service on the board or any board committees.
 
    Prior to April 25, 1996, each Non-Employee Director who is not an officer of
the  Company participated  in the  Company's Directors'  Bonus Compensation Plan
under which such directors were
 
                                       6
<PAGE>
eligible to receive annual awards  of up to $10,000  in Stock Units. The  actual
number  of  Stock Units  received  by each  eligible  director is  determined by
dividing the dollar value of the units awarded by the market value of the common
stock of the Company on the date of grant. In addition, when the Company pays  a
dividend on its common stock, pursuant to this plan it issues Stock Units to the
directors  equal to the dividends which would  have been paid if the Stock Units
previously awarded had been shares of  common stock. When the director  retires,
dies,  resigns or is  otherwise not reelected  as director, the  Stock Units are
settled for cash,  in an amount  determined by multiplying  the number of  Stock
Units  held by the  market value of the  Company's common stock  on the date the
director's service ends. The Company has  the right to terminate the  Directors'
Bonus Compensation Plan at any time. In lieu of the cash compensation payment to
Non-Employee  Directors for board committee  meeting attendance, the Company, in
its discretion, has provided  such compensation in the  form of awards of  Stock
Units  under the Plan.  During the fiscal  year 1996, Joseph  V. Schwan received
$6,700 in Stock Units,  Linda O. Doty  received $6,700 in  Stock Units, John  N.
McConnell  received $5,950 in Stock Units, and Fred W. Wenninger received $5,000
in Stock  Units. These  awards were  made in  July, 1995  for the  prior  year's
service   and  include  compensation  for   committee  meeting  attendance.  The
Directors' Bonus Compensation Plan was frozen as of April 25, 1996 by action  of
the  board and  no awards of  Stock Units were  or will be  made to Non-Employee
Directors for fiscal year 1996 service. Outstanding Stock Units will continue to
accrue cash  or stock  dividends  or other  distributions,  and the  holders  of
outstanding Stock Units will continue to have the right to receive distributions
in  connection with a merger, reorganization  or recapitalization of the Company
as currently provided in the Directors' Bonus Compensation Plan.
 
    Finally, Non-Employee Directors were awarded  stock options under, and  will
be  awarded automatic stock option grants pursuant to, the Non-Employee Director
Stock Plan, subject to approval of that Plan by the stockholders at this  Annual
Meeting.  In addition  the Plan  allows an  Non-Employee Director  under certain
circumstances to  obtain  Company Common  Stock  or  stock options  in  lieu  of
receiving  payment of his or her annual  retainer. A description of the Plan and
the compensation provided to  directors thereunder is  described in more  detail
below at "Approval of the Company's 1995 Non-Employee Director Stock Plan."
 
CERTAIN TRANSACTIONS AND BUSINESS RELATIONSHIPS
 
    See "Executive Employment Agreements" and "Compensation Committee Interlocks
and  Insider Participation" below for a  description of certain transactions and
business relationships, involving management of the Company.
 
           APPROVAL OF THE AMENDMENT TO THE COMPANY'S CERTIFICATE OF
         INCORPORATION TO REDUCE THE COMPANY'S AUTHORIZED COMMON STOCK
 
    On April 25, 1996 the Board of Directors of the Company adopted a resolution
approving an amendment to the Certificate of Incorporation of the Company,  that
would  reduce the number of authorized shares of Common Stock from 40,000,000 to
25, 000,000.  The  amendment is  subject  to  approval by  stockholders  at  the
Meeting.
 
    REASONS  FOR AND GENERAL EFFECT OF THE  AMENDMENT.  At the close of business
on June 30, 1996, 11,351,572 shares of Common Stock were issued and outstanding,
271,381 shares were held in the Company's treasury and an aggregate of 1,261,490
shares of Common Stock were reserved for issuance as follows: (i) 625,000 shares
were reserved  for issuance  upon the  exercise  of options  granted and  to  be
granted  under the  Company's 1993 Stock  Option Plan, (ii)  486,490 shares were
reserved under  the Company's  Employee Stock  Purchase Plan  and (iii)  150,000
shares were reserved for issuance upon the exercise of options granted and to be
granted  under the 1995  Non-Employee Director Stock  Plan (assuming approval by
stockholders of such plan at this  Annual Meeting). Accordingly, as of June  30,
1996,  of the 40,000,000 shares  of Common Stock authorized  for issuance by the
Certificate of Incorporation,  only 12,613,062 (excluding  treasury shares)  are
issued and outstanding or reserved for issuance.
 
                                       7
<PAGE>
    The amendment to the Certificate of Incorporation would reduce the number of
authorized  shares of Common Stock from  40,000,000 to 25,000,000. The reduction
in the  number  of  authorized shares  would  result  in an  annual  savings  of
approximately  $20,000 by reducing the amount  of annual franchise taxes payable
to the State of Delaware, the Company's state of incorporation. Franchise  taxes
in  the state of Delaware are currently  determined in accordance with a formula
that is based, in part,  on the amount of  a corporation's authorized shares  of
capital  stock. The Board of Directors believes that, even with the reduction to
25,000,000 shares, sufficient shares of Common  Stock will be available for  the
Company's present needs and its presently anticipated future needs.
 
    Approval  of  the  amendment to  the  Certificate of  Incorporation  and the
reduction in  the number  of authorized  shares of  Common Stock  would have  no
effect  on  the powers,  designations,  preferences or  relative, participating,
optional or other special  rights, qualifications or  restrictions of shares  of
Common Stock of the Company.
 
    REQUIRED VOTE.  The affirmative vote of a majority of the outstanding shares
of  Common Stock entitled  to vote on  this proposal is  required to approve the
amendment to the Certificate of Incorporation.
 
    THE BOARD OF DIRECTORS RECOMMENDS THAT STOCKHOLDERS VOTE FOR APPROVAL OF THE
AMENDMENT.
 
        APPROVAL OF THE COMPANY'S 1995 NON-EMPLOYEE DIRECTOR STOCK PLAN
 
    The Board of Directors adopted  the Hach Company 1995 Non-Employee  Director
Stock  Plan (the  "Director Stock  Plan" or  the "Plan")  on November  21, 1995,
subject to approval by the stockholders at the next Annual Meeting.
 
    The Board  of Directors  believes  that the  ownership  of Common  Stock  by
directors  supports the objective  of maximizing long-term  stockholder value by
aligning the interests of directors with those of the stockholders. The Plan  is
designed to provide a means of giving existing and new Non-Employee Directors an
increased  opportunity to acquire an investment  in the Company by providing for
the grant  of  stock  options  to outside  directors,  and  by  permitting  such
directors  to elect  to receive  all or  a portion  of their  annual retainer in
Common Stock, options to purchase Common Stock or a combination of both  options
and purchases.
 
SUMMARY OF THE DIRECTOR STOCK PLAN
 
    A  summary of  the Director Stock  Plan is  set forth below.  The summary is
qualified in its entirety by  reference to the full  text of the Director  Stock
Plan, which is attached to this Proxy Statement as Appendix A.
 
    The purpose of the Director Stock Plan is to promote the long-term growth of
Hach  Company enhancing its  ability to attract and  retain highly qualified and
capable non-employee directors  with diverse backgrounds  and experience and  by
increasing  the proprietary interest  of non-employee directors  in the Company.
Only non-employee directors of Hach Company  are eligible to participate in  the
Director Stock Plan. Currently, Hach Company has four non-employee directors.
 
    Subject  to  approval  of  the Director  Stock  Plan  by  stockholders, upon
adoption of the Plan  on November 21, 1995,  each current non-employee  director
was  granted an initial  option to purchase  5,000 shares of  Common Stock. Each
non-employee director who is first elected  after the adoption of the Plan  will
be  granted  an initial  option to  purchase  2,000 shares  of Common  Stock. In
addition, all non-employee  director participants  may elect  to receive  Common
Stock, or options to purchase Common Stock, or a combination of both, in lieu of
all  or a portion  of his or  her annual retainer.  Effective November 21, 1995,
non-employee directors are paid an annual retainer of $10,000.
 
    A maximum of 150,000 shares of Common Stock will be available for the  award
of  shares and the grant of stock options under the Director Stock Plan, subject
to adjustment  in the  event of  stock  splits, stock  dividends or  changes  in
corporate structure affecting Common Stock. To the extent a stock option granted
under  the Director Stock Plan expires  or terminates unexercised, the shares of
 
                                       8
<PAGE>
Common Stock  allocable  to the  unexercised  portion  of such  option  will  be
available  for awards under the Director Stock  Plan. In addition, to the extent
that shares are delivered (actually or by  attestation) to pay all or a  portion
of  an option exercise price, such shares will become available for awards under
the Director Stock Plan.
 
    If the Director Stock  Plan is approved  by stockholders, each  non-employee
director  will be  automatically granted an  option to purchase  1,000 shares of
Common Stock on September 1, 1996,  and each September 1st thereafter while  the
Director Stock Plan is in effect. If a non-employee director begins service on a
date  other than the date of the  annual meeting of Hach Company stockholders in
any year, the number  of shares subject  to the option  shall be prorated.  Each
non-employee  director may also elect to receive  a portion of his or her annual
retainer in Common  Stock or  options to purchase  Common Stock.  The number  of
shares  of Common Stock  issuable will be  based upon the  fair market value per
share of Common Stock (as defined in  the Director Stock Plan) on September  1st
in  the year  of such  election, and  will be  determined by  dividing such fair
market value into the amount of the annual retainer that the director elected to
receive in Common Stock. The number of stock options granted will be  determined
by  multiplying the amount of  the annual retainer that  the director elected to
receive in stock options by four, then dividing by such fair market value.
 
    The exercise price per share of all stock options granted under the Director
Stock Plan will be 100%  of the fair market value  per share of Common Stock  on
the  grant date,  defined as the  closing price on  the NASDAQ System  if one is
available, otherwise the mean between the bid and asked price on said System  at
the  close of business  on that date.  Options granted under  the Director Stock
Plan vest immediately, but are not exercisable until six months from the date of
grant. Options granted under the Director Stock Plan may be exercised until  the
tenth  anniversary of the date of grant.  Options may be exercised either by the
payment of cash in the amount of  the aggregate option price or by  surrendering
(or  attesting to ownership of) shares of  Common Stock owned by the participant
for at  least six  months  prior to  the  date the  option  is exercised,  or  a
combination of both, having a combined value equal to the aggregate option price
of  the shares subject to  the option or portion  of the option being exercised.
Any option or  portion thereof  that is  not exercised  on or  before the  tenth
anniversary of the date of grant shall expire.
 
    Options  granted under the  Director Stock Plan will  not be transferable by
the participant other  than by  court order,  will or  the laws  of descent  and
distribution,  unless such transferability  is permitted under  Rule 16b-3 under
the Exchange Act and will be exercisable during the participant's lifetime  only
by  the  participant  or  the participant's  guardian,  legal  representative or
similar person.
 
    Upon the occurrence of a "change of  control" of Hach Company as defined  in
the  Director  Stock Plan,  any and  all outstanding  options granted  under the
Director Stock Plan become immediately exercisable.
 
FEDERAL INCOME TAX CONSEQUENCES
 
    The grant of  an option under  the Director  Stock Plan will  not result  in
income  for the participant or in a  deduction for Hach Company. The exercise of
an option will generally result in compensation income for the participant and a
deduction for Hach Company, in each case measured by the difference between  the
exercise price and the fair market value of the shares at the time of exercise.
 
    The  receipt of shares  of Common Stock  under the Director  Stock Plan will
generally result in compensation income for the participant and a deduction  for
Hach Company, based on the fair market value of the shares on the date awarded.
 
ADMINISTRATION OF THE DIRECTOR STOCK PLAN
 
    The  Director Stock Plan will be administered by a Committee of the Board of
Directors  consisting  of  two  or  more  directors  who  are  not  eligible  to
participate  in the  Plan. The  Board of  Directors may  amend or  terminate the
Director Stock Plan at any time, but  the terms of any option granted under  the
Director  Stock Plan  may not  be adversely  modified without  the participant's
consent. In addition, the  Board of Directors may  not amend the Director  Stock
Plan more than once every six months to
 
                                       9
<PAGE>
change  the number  of shares  subject to  an option,  the exercise  price of an
option, the grant date of an  option, or the termination provisions relating  to
an  option,  other  than  to  comply with  changes  in  the  Code,  the Employee
Retirement Income Security Act of 1974, as amended, or the rules and regulations
promulgated thereunder.
 
ADDITIONAL INFORMATION
 
    The closing price of Hach Common Stock, as reported on the NASDAQ System  on
November 21, 1995, was $16.125.
 
    The  affirmative vote of a majority of  the votes cast on this proposal will
constitute approval of the Director Stock Plan.
 
NEW PLAN BENEFITS
 
    As summarized in the  following table, on  the date of  the adoption of  the
Director  Plan  by the  Board, the  Compensation Committee  granted each  of the
Company's four (4) Non-Employee Directors an option to purchase 5,000 shares  of
Common  Stock at a fair market value  exercise price of $16.125 per share. Since
only Non-Employee Directors are eligible to  be granted options under the  Plan,
no  options  have  been  granted  to  (a)  the  persons  named  in  the  Summary
Compensation  Table  below  under  the  caption  "Executive  Compensation",  (b)
executive officers of the Company, or (c) any other of the Company's employees.
 
<TABLE>
<CAPTION>
                                          DOLLAR
GROUP                                    VALUE(1)     NUMBER OF UNITS
- ------------------------------------  --------------  ---------------
<S>                                   <C>             <C>
Non-Employee Director Group                N/A              20,000
</TABLE>
 
- ------------------------
(1)  All  options  under  the  Plan  will  be  granted  at  fair  market  value.
    Accordingly, the dollar value benefit  is based upon future appreciation  in
    the Company's Common Stock and is not presently determinable.
 
    THE  BOARD  OF  DIRECTORS  RECOMMENDS  A  VOTE  FOR  APPROVAL  OF  THE  1995
NON-EMPLOYEE DIRECTOR STOCK PLAN.
 
                                       10
<PAGE>
                             EXECUTIVE COMPENSATION
 
SUMMARY COMPENSATION TABLE
 
    The following  table provides  summary information  concerning  compensation
paid  by the Company to  its Chief Executive Officer and  each of the four other
most highly compensated executive officers of the Company (hereafter referred to
as the "named executive  officers") for the fiscal  years ended April 30,  1996,
1995  and 1994. No  amounts were required  to be disclosed  in the "Other Annual
Compensation" column  under applicable  United  States Securities  and  Exchange
Commission ("SEC") rules.
 
                           SUMMARY COMPENSATION TABLE
<TABLE>
<CAPTION>
                                                                                   LONG TERM COMPENSATION AWARDS(2)
                                               ANNUAL COMPENSATION                ----------------------------------
                                                                                                         SECURITIES
                                               --------------------                   OTHER ANNUAL       UNDERLYING
NAME AND PRINCIPAL POSITION                      YEAR      SALARY       BONUS        COMPENSATION(1)       OPTIONS
- ---------------------------------------------  ---------  ---------  -----------  ---------------------  -----------
<S>                                            <C>        <C>        <C>          <C>                    <C>
Kathryn Hach-Darrow                                 1996  $ 126,089   $       0                                   0
Chairman of the Board and                           1995    126,004           0                --                 0
 Chief Executive Officer                            1994    125,887           0                                   0
Bruce J. Hach                                       1996  $ 173,449   $       0                              12,000
President and Chief                                 1995    160,280           0                --                 0
 Operating Officer                                  1994    144,028           0                              10,000
Loel J. Sirovy                                      1996  $ 127,848   $       0                              12,000
Senior Vice President,                              1995    122,285           0                --                 0
 Operations                                         1994    111,159           0                              10,000
Jerry M. Churchill                                  1996  $ 122,273   $       0                              10,000
Vice President, Domestic Sales                      1995    119,562           0                --                 0
                                                    1994    111,159           0                               7,500
Gary R. Dreher                                      1996  $ 119,877   $       0                              12,000
Vice President and                                  1995    109,774           0                                   0
 Chief Financial Officer                            1994     96,434           0                              10,000
 
<CAPTION>
 
                                                  ALL OTHER
NAME AND PRINCIPAL POSITION                    COMPENSATION(3)
- ---------------------------------------------  ----------------
<S>                                            <C>
Kathryn Hach-Darrow                               $   20,237
Chairman of the Board and                             18,049
 Chief Executive Officer                              18,041
Bruce J. Hach                                     $   20,004
President and Chief                                   17,513
 Operating Officer                                    17,056
Loel J. Sirovy                                    $   21,512
Senior Vice President,                                18,312
 Operations                                           16,972
Jerry M. Churchill                                $   20,324
Vice President, Domestic Sales                        18,016
                                                      16,972
Gary R. Dreher                                    $   18,397
Vice President and                                    15,366
 Chief Financial Officer                              14,797
</TABLE>
 
- ------------------------
(1)  The aggregate  amount of  perquisites and  other personal  benefits did not
    exceed the lesser of $50,000 or ten percent (10%) of the total annual salary
    and bonus  reported for  any of  the named  officers, and  is therefore  not
    included.
 
(2) No named executive officer had any restricted stock holdings as of April 30,
    1996. The Company has not granted any stock appreciation rights to any named
    executive officer. Kathryn Hach-Darrow does not participate in the Company's
    stock option plans.
 
(3)  The  amounts reported  as "All  Other  Compensation" include  the following
    payments or accruals under the Company's benefit and incentive plans:
 
    (i) Company  contributions during  fiscal 1996  under the  Company's  Profit
       Sharing  Plan (including  Company contributions made  pursuant to Section
       401(k) of the Internal Revenue Code) as follows: K. Hach-Darrow  $11,384,
       B.  Hach $10,015, L.  Sirovy $11,094, J. Churchill  $10,316 and G. Dreher
       $9,806. Under the Plan, all domestic  full time employees of the  Company
       with  six  or more  months of  service are  eligible to  participate. The
       Company's  annual  contribution   (after  allocation   of  the   matching
       contribution described below) is determined by the Board of Directors and
       is  proportionately allocated  to participants'  accounts based  on their
       annual compensation  not in  excess of  $200,000. Participants'  accounts
       attributable  to the Company's  contribution vest at the  rate of 10% for
       each of the  first four years  of service and  20% for each  of the  next
       three  years of  service. The  Profit Sharing  Plan includes  a voluntary
       salary reduction  provision  as  authorized  by  Section  401(k)  of  the
       Internal  Revenue Code. All employee  contributions and any contributions
       by the Company that the Board of Directors
 
                                       11
<PAGE>
       determines are pursuant  to Section  401(k), vest  immediately. The  Plan
       provides for a matching contribution in the form of Company stock for all
       contributions by employees with one or more years of service in an amount
       of  50% of the employee's yearly contribution  up to a maximum of 2.0% of
       the employee's yearly compensation. Matching contributions by the Company
       vest at the rate of 10% for each  of the first four years of service  and
       20%  for each  of the  next three  years of  service. All  vested amounts
       allocated to the participants' accounts are distributable upon retirement
       at or after age  65, termination of  employment, permanent disability  or
       death.
 
    (ii)  Company  contributions  during  fiscal  1996  to  the  Employee  Stock
       Ownership Plan  ("ESOP")  as  follows: K.  Hach-Darrow  $3,754,  B.  Hach
       $4,293,  L. Sirovy $3,659, J. Churchill  $3,402 and G. Dreher $3,234. All
       domestic full time employees  of the Company with  six or more months  of
       service  are eligible  to participate in  the ESOP.  The Company's annual
       contribution to the ESOP is determined  by the Board of Directors and  is
       proportionately allocated to participants' accounts based on their annual
       compensation not in excess of $200,000. Except for participants' accounts
       transferred  in 1989 from an earlier employee stock ownership plan, which
       are fully vested, participants' accounts in the ESOP vest at the rate  of
       10%  for each of the  participant's first four years  of service with the
       Company and  20%  for each  of  the  participant's next  three  years  of
       service.  The ESOP invests primarily in Company stock. All amounts in the
       participants' accounts in the ESOP  are distributable upon retirement  at
       or  after  age 65,  termination  of employment,  permanent  disability or
       death.
 
    (iii) Imputed  compensation  under  Group Term  Life  Insurance  Program  as
       follows:  K.  Hach-Darrow  $5,099, B.  Hach  $696, L.  Sirovy  $1,759, J.
       Churchill $1,606  and G.  Dreher $357.  The program,  which is  generally
       available  to all employees, provides coverage during employment equal to
       twice salary. The above amounts of premiums paid by the Company on behalf
       of named executive officers under  the program represent amounts  imputed
       as  compensation to  such executive  officers under  the Internal Revenue
       Code of 1986, as amended.
 
    (iv) Company  contributions during  the 1996  fiscal year  to the  Company's
       Deferred Compensation Plan as follows: K. Hach-Darrow $0, B. Hach $5,000,
       L.  Sirovy  $5,000, J.  Churchill $5,000  and  G. Dreher  $5,000. Company
       contributions on  behalf of  eligible key  employees under  the  Deferred
       Compensation  Plan  are  determined  on  an  annual  basis  in  the  sole
       discretion of the Plan's administration committee, which is appointed  by
       the  Board of Directors.  The Deferred Compensation  Plan also allows all
       eligible key employees to defer up to 25% of their base compensation  and
       up  to 100% of bonuses and certain  other payments on a tax favored basis
       into a tax exempt trust pursuant to Internal Revenue Service  guidelines.
       The  employee accounts are invested by  the Plan trustee in an investment
       fund  as  directed   by  the  administration   committee.  The   Deferred
       Compensation   Plan  is  the  result  of  March  1,  1995  amendment  and
       reconstitution of  the  Company's Supplemental  Executive  Benefits  Plan
       ("SEBP"),  which was first established  in 1988. Internal Revenue Service
       limits on  the  Deferred  Compensation Plan  preclude  in  1996  elective
       employee  contributions of more  than $9,240 or  an eligible compensation
       base of more than  $150,000 for any  one employee. Compensation  deferred
       under  the  Deferred  Compensation  Plan at  the  election  of  the named
       executives are included above in  the category (e.g., salary, bonus)  and
       year it would otherwise have been reported had it not been deferred.
 
                                       12
<PAGE>
STOCK OPTION GRANTS IN LAST FISCAL YEAR
 
    The  Company maintains the  1993 Stock Option Plan  (the "Option Plan"). The
Option Plan is administered by the Compensation Committee of the Company's Board
of Directors which, in  its sole discretion, determines  the persons from  among
salaried,  full-time employees  owning less than  five percent  of the Company's
outstanding stock to whom options, either incentive or non-incentive as  defined
in  Section 422 of the Internal Revenue Code,  will be granted and the terms and
conditions of  each grant  within the  limits imposed  by the  Option Plan.  The
following  table provides information  relating to options  granted to the named
executive officers during fiscal 1996.
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                 INDIVIDUAL GRANTS(1)
                              --------------------------
                               NUMBER OF    % OF TOTAL                                 POTENTIAL REALIZABLE VALUE AT ASSUMED
                              SECURITIES      OPTIONS     EXERCISE                   ANNUAL RATES OF STOCK PRICE APPRECIATION
                              UNDERLYING    GRANTED TO     OR BASE                                FOR OPTION TERM
                                OPTIONS    EMPLOYEES IN   PRICE ($/   EXPIRATION    -------------------------------------------
NAME                          GRANTED (#)   FISCAL YEAR      SH)         DATE          0%            5%              10%
- ----------------------------  -----------  -------------  ---------  -------------  ---------  --------------  ----------------
<S>                           <C>          <C>            <C>        <C>            <C>        <C>             <C>
Kathryn C. Hach.............           0           --            --             --         --              --                --
Bruce J. Hach...............      12,000          5.3%    $  16.125     11/21/2000  $       0  $       53,460  $        118,134
Loel J. Sirovy..............      12,000          5.3%       16.125     11/21/2000          0          53,460           118,134
Jerry M. Churchill..........      10,000          4.4%       16.125     11/21/2000          0          44,550            98,445
Gary R. Dreher..............      12,000          5.3%       16.125     11/21/2000          0          53,460           118,134
All Shareholders' Potential
 Realizable Value(2)........                                                        $       0  $   50,621,000  $    111,866,000
</TABLE>
 
- ------------------------
(1) Based on 225,000 options granted to employees in fiscal 1996.
 
(2)  The  potential  realizable  value   to  all  shareholders  at  the   stated
    appreciation  rates is  based on  shares outstanding  at November  21, 1995,
    assuming such shares  were purchased for  $16.125 on November  21, 1995  and
    held until November 21, 2000.
 
AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR END OPTION
VALUES
 
    The  following  table shows  information  concerning the  exercise  of stock
options by each  of the  named executive officers  during fiscal  1996, and  the
value  of all remaining exercisable and unexercisable options at April 30, 1996,
on a pre-tax basis.
 
                                       13
<PAGE>
              AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND
                         FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                               NUMBER OF SECURITIES        VALUE OF UNEXERCISED
                                                              UNDERLYING OPTIONS AT        IN-THE-MONEY OPTIONS
                                                   VALUE            4/30/96(#)               AT 4/30/96($)(2)
                                SHARES ACQUIRED  REALIZED   --------------------------  --------------------------
NAME                            ON EXERCISE(#)    ($)(1)    EXERCISABLE  UNEXERCISABLE  EXERCISABLE  UNEXERCISABLE
- ------------------------------  ---------------  ---------  -----------  -------------  -----------  -------------
<S>                             <C>              <C>        <C>          <C>            <C>          <C>
Kathryn Hach-Darrow...........             0     $       0           0             0     $       0    $         0
Bruce J. Hach.................             0             0       6,667        15,333         7,000         17,000
Loel J. Sirovy................             0             0      16,667        15,333         7,000         17,000
Jerry M. Churchill............         1,187        11,917      10,000        12,500         5,250         13,875
Gary R. Dreher................           864         6,083      16,667        15,333         7,000         17,000
</TABLE>
 
- ------------------------
(1) The value realized on exercise of stock options is calculated by subtracting
    the exercise price from the market value of the Company's Common Stock as of
    the exercise date.
 
(2) The value of unexercised in-the-money  options is equal to the market  value
    of  the Common Stock at April 30, 1996 ($17.25 per share) less the per share
    option  exercise  price   multiplied  by  the   number  of  exercisable   or
    unexercisable options, as the case may be.
 
                                       14
<PAGE>
EXECUTIVE EMPLOYMENT AGREEMENTS
 
    Each  of the executive officers identified below has an employment agreement
with the Company which comes into effect only upon a "Change of Control" of  the
Company  (as defined in  the agreements), and  thereafter provides for continued
employment of such  individual for  a three  year term  (which is  automatically
renewed annually for one year unless either party gives six months prior written
notice of termination) (the "Employment Period") at an annual compensation rate,
and  with such employment benefits, as in effect at the time of the commencement
of the Employment Period. The  agreement, once triggered, further provides  that
if  the individual's employment is terminated by the Company (except for "cause"
as defined in the agreements) or  if the individual should resign under  certain
circumstances  set forth in the agreements,  the individual shall be entitled to
certain payments described  below. The  executive officers  who have  employment
contracts  are  Messrs.  Hach, Sirovy,  Churchill,  Dreher,  Peterson, Thompson,
Privette and  Ogan,  and their  current  annual compensation  rates  range  from
$93,500 to 165,000.
 
    The Board of Directors believes that the Agreements assure fair treatment of
the executive officers in relation to their careers with the Company by assuring
them of some financial security. The Agreements also protect the stockholders by
encouraging  the executive officers to continue  their attention to their duties
without distraction in  a potentially disturbing  circumstance and  neutralizing
any  bias they  might have  in evaluating proposals  for the  acquisition of the
Company.
 
    Upon the death of an individual,  the Company is obligated to make  payments
to the beneficiary or representative of the deceased at a rate equal to one-half
of the annual compensation rate in effect on the date of death, until the end of
the  term of  the agreement  (without reduction  of any  life insurance benefits
payable directly to the deceased's beneficiaries or estate).
 
    If the individual's  employment is terminated  by the Company  by reason  of
such  individual's disability, the Company is obligated  to pay a salary to such
individual at the annual rate in effect upon termination for the remaining  term
of the Agreement.
 
    The  agreements entitle an individual to resign during the Employment Period
if, without  his consent  in any  circumstance other  than his  disability,  his
office  in the  Company or  the geographical  area of  his employment  should be
changed. Upon such resignation, the individual is entitled to a lump sum payment
equal to the aggregate cash compensation (based on his annual compensation  rate
at the time of termination) which would have been payable to the individual over
the  remaining term of the agreement had  it not been terminated, plus any other
benefits which would have been payable to him during such period (including  the
fair  market value of any stock options  or other stock rights granted him under
any stock plans of the Company).
 
    Each agreement includes a covenant by  the individual providing that if  the
individual's  employment terminates for any  reason he will not  for a period of
twelve months following  the termination  of his employment  engage directly  or
indirectly  in  any competitive  business,  nor will  he  at any  time following
termination use the confidential information of the Company.
 
                           REPORT OF THE COMPENSATION
                      COMMITTEE ON EXECUTIVE COMPENSATION
 
    The Compensation  Committee of  the Board  of Directors  is responsible  for
reviewing  and recommending the compensation and other remuneration afforded the
named executive officers of the Company,  including the grants of stock  options
under  the  Company's  Stock Option  Plans.  All decisions  by  the Compensation
Committee relating to the compensation of the Company's named executive officers
are reviewed and approved by the full Board.
 
                                       15
<PAGE>
    In carrying  out  its  responsibilities in  fiscal  1996,  the  Compensation
Committee, as it has in prior years, considered the following:
 
    - Financial  performance of the Company  as a whole on  both a long-term and
      short-term basis  (including the  increases  in operating  income,  sales,
      shareholder  values,  and returns  on assets  and  equity achieved  by the
      Company in the prior fiscal year).
 
    - The Company's evaluation of the executive officers with respect to overall
      job performance,  including, with  respect  to each  individual  executive
      officer,  the financial performance  of that area of  the Company, if any,
      for which such executive officer is responsible.
 
    - The  Company's  policy  and   practices  for  compensation  of   employees
      generally.
 
    - Review  of general compensation surveys prepared by executive compensation
      consultants and available to the public.
 
    - Such other  material information  which the  Compensation Committee  deems
      appropriate in the case of any particular individual.
 
GENERAL COMPENSATION POLICY
 
    The  Committee's fundamental  compensation policy  is to  make a substantial
portion of an executive's compensation contingent upon the financial performance
of the Company. Accordingly,  in addition to each  executive's base salary,  the
Company  offers bonuses and stock option awards  which are tied to the Company's
and  executive's  performance   goals.  Prior  to   November,  1995,   executive
compensation   consisted  of  salary,  benefits  and  stock  options.  Effective
November, 1995, the Board of Directors  approved a new compensation package  for
key management which added an incentive compensation component. The Compensation
Committee  believes that providing incentives to the executive officers benefits
stockholders by aligning the long-term interests of stockholders and employees.
 
    There are four components of key management's compensation package:
 
    - Salary
 
    - Benefits, which  include  only  medical, dental  and  life  insurance  and
      participation in a profit sharing and 401(k) plan
 
    - eligibility  for  equity  purchase  on  more  favorable  terms  than those
      available to the outside common stockholder (through the 1993 Stock Option
      Plan and through the Company's Employee Stock Purchase Plan)
 
    - Eligibility for annual incentive compensation
 
FACTORS
 
    Several of the more important factors which were considered in  establishing
the  components of  each executive officer's  compensation package  for the 1996
fiscal year  are  summarized below.  Additional  factors were  also  taken  into
account,  and the Compensation Committee may,  in its discretion, apply entirely
different factors, particularly different measures of financial performance,  in
setting   executive  compensation   for  future   fiscal  years.   However,  all
compensation decisions  will be  designed to  further the  general  compensation
policy indicated above.
 
BASE SALARY
 
    Except  as provided below with respect  to Mrs. Hach-Darrow, the base salary
for each executive  officer is  set on the  basis of  personal performance,  the
salary  levels in effect  for comparable positions  with the Company's principal
competitors  and   the  Company's   financial  performance   relative  to   such
competitors.  Factors relating  to individual  performance that  are assessed in
setting base  compensation are  based  on the  particular  duties and  areas  of
responsibility of the individual executive officer.
 
                                       16
<PAGE>
Factors  relating to the Company's financial  performance that may be related to
increasing  or  decreasing  base  salary  include  revenues  and  earnings.  The
establishment of base compensation involves a subjective assessment and weighing
of the foregoing criteria and is not based on any specific formula.
 
ANNUAL INCENTIVE COMPENSATION
 
    In  November,  1995,  the  Company  established  the  Hach  Company  Officer
Incentive Bonus Plan (the "Incentive Bonus  Plan") which is an annual  incentive
plan  that provides cash compensation up to  a maximum percentage of annual base
salary based on the achievement of  goals set by the Compensation Committee  for
the  Company  and  the  elected  executive officers  that  are  designated  on a
year-to-year  basis  by  the  Compensation  Committee  for  participation.   The
overriding  principle of the Incentive Bonus Plan  is to motivate and reward key
management  to  achieve  above  average  results.  The  bonus  element  of   the
participant's  total  compensation package  is therefore,  more results-oriented
than any other element.
 
    There were six participants in the Incentive Bonus Plan in fiscal 1996.  All
named executive officers, other than Kathryn Hach-Darrow and Bruce Hach, who are
not  eligible to participate in the Incentive Bonus Plan, were designated by the
Compensation Committee as eligible  for fiscal year  1996 awards. The  Incentive
Bonus  Plan  is offered  only  to elected  officers  because they  can influence
corporate results more than the other  employee group. The Incentive Bonus  Plan
is  administered by the  Compensation Committee. The  Compensation Committee may
amend the Incentive Bonus  Plan or discontinue the  Incentive Bonus Plan at  any
time.
 
    For  the  last  six  months  of  fiscal  1996,  the  Compensation  Committee
established corporate performance goals for  net sales growth, increases in  net
income  as  a percentage  of  net sales,  and  economic value  added. Individual
management goals were set for each executive, depending on his or her particular
responsibilities and strategic objectives  for the year. For  the six months  of
fiscal  1996, the  maximum percentage  of base  salary which  can be  paid to an
executive under  the Incentive  Bonus Plan  was set  at 12.5%  (and the  maximum
percentage  for the full 1997 fiscal  year will be 25%). As  of the date of this
report, the determination as  to whether performance  goals under the  Incentive
Bonus Plan have been met has not been completed and consequently, no awards have
been   paid  under  the  Incentive  Bonus  Plan  based  upon  fiscal  1996  year
performance. Any bonus amounts paid to named executive officers pursuant to  the
Incentive Bonus Plan after the date hereof will be reported, as required, in the
Summary Compensation Table included in next year's proxy statement.
 
STOCK OPTIONS
 
    All  stock options are granted under the 1993 Plan and are intended to align
the interests  of  each officer-optionee  with  those of  the  stockholders  and
provide  them  with  a significant  incentive  to  manage the  Company  from the
perspective of an owner with an equity interest in the success of the  business.
The  size of the option grant made to each executive officer under the 1993 Plan
is based  upon that  individual's current  position with  the Company,  internal
comparability  with  option  grants made  to  other Company  executives  and the
individual's potential for future responsibility  and promotion over the  option
term.
 
    During  fiscal  year 1996,  the Compensation  Committee granted  those stock
option awards to the  named executive officers  as are set  forth in the  option
grant  table above under the heading "Executive Compensation-Stock Option Grants
in the Last Fiscal Year".
 
COMPENSATION OF THE CHIEF EXECUTIVE OFFICER
 
    The Compensation  Committee meets  without  Kathryn Hach-Darrow  present  to
evaluate  her performance and  to determine its recommendations  to the Board of
Directors with respect to her compensation as the Chief Executive Officer.  Mrs.
Hach-Darrow,  other  than  by  her  participation  in  general  employee benefit
programs, has been compensated by the  Company almost solely through her  annual
salary.  She is not eligible to participate in the Company's Stock Option Plans,
Officer Incentive Bonus Plan or Employee Stock Purchase Plan.
 
                                       17
<PAGE>
    The Compensation Committee continues to  believe that the compensation  paid
to   Kathryn  Hach-Darrow  does  not  adequately   reflect  the  value  of  Mrs.
Hach-Darrow's  contributions  to  the  Company's  performance  and  the  returns
recognized  by the Company's shareholders and  has not been competitive with the
compensation paid  to  the  chief  executive  officers  of  other  manufacturing
companies  of  comparable  sales  size.  Notwithstanding  the  position  of  the
Compensation Committee, Mrs. Hach-Darrow,  as she has in  most prior years,  has
again  this year declined  the increases in her  compensation recommended by the
Compensation Committee. Consequently, Mrs. Hach-Darrow's fiscal 1996 base salary
remained at $125,000, the  same amount she received  in fiscal years 1993,  1994
and 1995.
 
COMPLIANCE WITH INTERNAL REVENUE CODE SECTION 162(M)
 
    Section  162(m) of  the Internal  Revenue Code,  enacted in  1993, generally
disallows a tax deduction to public  companies for compensation over $1  million
paid  to the named executive officers. Qualifying performance based compensation
is not subject to the deduction limit if certain requirements are met.
 
    The Compensation Committee continues to monitor qualifying compensation paid
to its  named executive  officers  for deductibility  under the  Section  162(m)
limits  for executive salaries. Compensation paid to such persons did not exceed
this limitation  in fiscal  year  1996 and  is  not expected  to  do so  in  the
forseeable future.
 
SUMMARY
 
    The  Compensation Committee believes that the policies and objectives of the
compensation programs at the  Company serve to  keep shareholder and  management
interests  in building  value closely aligned  and are  consistent with programs
maintained by comparable industrial  companies. The Company's senior  leadership
team  continues to  move aggressively  to position  the organization  for global
competition. Their efforts during fiscal 1996 have made the Company stronger and
well-positioned for world-wide opportunities.
 
                                          COMPENSATION COMMITTEE:
 
                                          John N. McConnell, Chairman
                                          Kathryn Hach-Darrow
                                          Joseph V. Schwan
                                          Linda O. Doty
 
                                       18
<PAGE>
PERFORMANCE GRAPH
 
    The following graph prepared by the  Center for Research in Security  Prices
compares  the cumulative  total shareholder  return on  the Common  Stock of the
Company from April 30, 1991, through  April 30, 1996, with the cumulative  total
shareholder  return  for the  Standard and  Poor's 500  Index and  the Company's
Self-Determined Peer Group (as defined below) over the same period, assuming the
investment of $100 on April 30, 1991 and the full reinvestment of all dividends.
The companies  that comprise  the Company's  Self-Determined Peer  Group are  as
follows: Betz Laboratories, Inc.; Dionics Corporation; Ionics, Inc.; Isco, Inc.;
Millipore Corporation; OI Corporation; Osmonics, Inc.; Perkin Elmer Corporation;
Thermo Instrument Systems, Inc. and VWR Corporation.
 
                COMPARISON OF FIVE YEAR-CUMULATIVE TOTAL RETURNS
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
                           LEGEND
<S>                                                            <C>              <C>               <C>
CRSP Total Returns Index for:
                                                                  Hach Company    S&P 500 Stocks  Self-Determined Peer Group
4/30/91                                                                  100.0             100.0                       100.0
4/30/92                                                                  160.5             114.0                       106.8
4/30/93                                                                  158.2             124.5                       107.0
4/29/94                                                                  117.9             130.8                       118.0
4/28/95                                                                  131.6             153.8                       131.8
4/30/96                                                                  143.9             200.7                       202.0
Notes:
A. The lines represent monthly index levels derived from
compounded daily returns that include all dividends.
B. The indexes are reweighted daily, using the market
capitalization
on the previous trading day.
C. If the monthly interval, based on the fiscal year-end, is
not
a trading day, the preceding trading day is used.
D. The index level for all series was set to $100.0 on
04/30/91.
</TABLE>
 
                                       19
<PAGE>
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The  following directors served as members  of the Compensation Committee of
the Company's Board of Directors  during fiscal 1996: Kathryn Hach-Darrow,  John
N. McConnell, Joseph V. Schwan and Linda O. Doty.
 
    Kathryn  Hach-Darrow is the Chief Executive Officer of the Company. Although
Mrs. Hach-Darrow served on the Compensation Committee she did not participate in
any decisions regarding her own compensation as an executive officer other  than
as described in the last sentence of the Compensation Committee's Report above.
 
                    INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS
 
    The Board of Directors of the Company, acting upon the recommendation of the
Audit  Committee,  has  selected  the  firm  of  Coopers  &  Lybrand  L.L.P.  as
independent certified public accountants of the Company and its subsidiaries for
the fiscal  year 1997.  Coopers  & Lybrand  L.L.P.  also served  as  independent
certified  public accountants during  the fiscal year  1996. A representative of
Coopers & Lybrand L.L.P. is  expected to be present at  the meeting and will  be
afforded  the opportunity to make a statement if  he or she desires to do so. He
or she will also respond to appropriate questions raised by the stockholders.
 
                           1997 STOCKHOLDER PROPOSALS
 
    In order  for stockholder  proposals  for the  1997  Annual Meeting  of  the
Stockholders  to be eligible for inclusion  in the Company's proxy statement for
such meeting, they must be  received by the Company  at its principal office  in
Loveland, Colorado prior to March 25, 1997.
 
                                    GENERAL
 
    The  management knows of no other matters which may come before the meeting.
However, if  any other  matters are  properly brought  before the  meeting,  the
persons named in the endorsed proxy or their substitutes will vote in accordance
with their best judgment on such matters.
 
    The  cost of soliciting proxies will be borne by the Company. In addition to
solicitation by  mail, directors,  officers  and employees  of the  Company  may
solicit proxies by telephone or otherwise. The Company will reimburse brokers or
other persons holding stock in their names or in the names of their nominees for
their  reasonable charges and expenses in forwarding proxies and proxy materials
to the beneficial owners of such stock.
 
    A copy of the Company's 1996  Annual Report to the United States  Securities
and  Exchange Commission on Form 10-K may  be obtained without charge by writing
to the Company at P.O. Box 389, Loveland, Colorado 80539, attention Mr. Gary  R.
Dreher, Vice President and Chief Financial Officer.
 
                                          By Order of the Board of Directors
 
                                          ROBERT O. CASE, SECRETARY
 
July 22, 1996
 
                                       20
<PAGE>
                                                                       EXHIBIT A
 
                                  HACH COMPANY
                     1995 NON-EMPLOYEE DIRECTOR STOCK PLAN
                        ARTICLE I -- PURPOSE OF THE PLAN
 
    The  purpose of the Hach Company 1995 Non-Employee Director Stock Plan is to
promote the  long-term growth  of  Hach Company  by increasing  the  proprietary
interest  of Non-Employee  Directors in Hach  Company and to  attract and retain
highly qualified and capable Non-Employee Directors.
 
                           ARTICLE II -- DEFINITIONS
 
    Unless the context  clearly indicates otherwise,  the following terms  shall
have the following meanings:
    2.1   "ANNUAL  RETAINER" means the  annual cash retainer  fee payable by the
Corporation to  a  Non-Employee Director  for  services  as a  director  of  the
Corporation, as such amount may be changed from time to time.
 
    2.2   "AWARD"  means an award  granted to a  Non-Employee Director under the
Plan in the form of Options or Shares, or any combination thereof.
 
    2.3   "BOARD" means the Board of Directors of Hach Company.
 
    2.4   "CORPORATION" means Hach Company.
 
    2.5   "FAIR MARKET VALUE" shall  mean the value of  one Share of Hach  stock
determined as follows:
 
        (a)  If  the shares are traded on an exchange, the price at which Shares
             traded at the close of business on the date of valuation; or
 
        (b)  If the Shares are traded over-the-counter on the NASDAQ System, the
             closing price if one is available, or the mean between the bid  and
    asked  prices  on  said System  at  the close  of  business on  the  date of
    valuation; or
 
        (c)  if neither (a)  nor (b)  above applies,  the fair  market value  as
             determined  by  the  Board or  the  Committee in  good  faith. Such
    determination shall be conclusive and binding on all persons.
 
    2.6   "OPTION" means an Option to purchase Shares awarded under Article VIII
or IX  which does  not meet  the requirements  of Section  422 of  the  Internal
Revenue Code of 1986, as amended, or any successor law.
 
    2.7   "OPTION  GRANT DATE" means the date upon which an Option is granted to
a Non-Employee Director.
 
    2.8   "OPTIONEE" means a Non-Employee Director of the Corporation to whom an
Option has been granted or, in  the event of such Non-Employee Director's  death
prior  to the  expiration of an  Option, such  Non-Employee Director's executor,
administrator, beneficiary or  similar person, or,  in the event  of a  transfer
permitted by Article VII hereof, such permitted transferee.
 
    2.9   "NON-EMPLOYEE DIRECTOR" means a director of the Corporation who is not
an employee of the Corporation or any subsidiary of the Corporation.
 
    2.10  "PLAN"  means the Hach Company  1995 Non-Employee Director Stock Plan,
as amended and restated from time to time.
 
    2.11  "STOCK AWARD DATE"  means the date  on which Shares  are awarded to  a
Non-Employee Director.
 
    2.12  "SHARES"  means shares of the Common Stock, par value $1.00 per share,
of the Corporation.
 
                                      A-1
<PAGE>
    2.13  "STOCK  OPTION  AGREEMENT"  means   a  written  agreement  between   a
Non-Employee Director and the Corporation evidencing an Option.
 
                   ARTICLE III -- ADMINISTRATION OF THE PLAN
 
    3.1   ADMINISTRATOR  OF  THE  PLAN.  The Plan  shall  be  administered  by a
Committee appointed by the Board and consisting of two or more Directors who are
not eligible to participate in the Plan ("Committee").
 
    3.2   AUTHORITY OF COMMITTEE.  Subject to  the provisions of  the Plan,  the
Committee shall have full power and authority to: (i) interpret and construe the
Plan  and  adopt such  rules  and regulations  as  it shall  deem  necessary and
advisable to implement and administer the Plan and (ii) designate persons  other
than members of the Committee to carry out its responsibilities, subject to such
limitations,   restrictions   and   conditions  as   it   may   prescribe,  such
determinations to  be made  in  accordance with  the Committee's  best  business
judgment as to the best interests of the Corporation and its stockholders and in
accordance  with the purposes of the  Plan, provided, however that the Committee
shall have  no  discretion with  respect  to  the eligibility  or  selection  of
Non-Employee  Directors to receive options under  the Plan, the number of shares
of stock  subject  to any  such  options or  the  Plan, or  the  purchase  price
thereunder,  nor shall the Committee  have authority to take  any action or make
any determination  that  would  materially increase  the  benefits  accruing  to
participants  under the Plan.  The Committee may  delegate administrative duties
under the Plan to one or more agents as it shall deem necessary or advisable.
 
    3.3   DETERMINATIONS  OF  COMMITTEE.  A  majority  of  the  Committee  shall
constitute  a quorum at any meeting of  the Committee, and all determinations of
the Committee shall be made by a  majority of its members. Any determination  of
the  Committee under  the Plan may  be made without  notice or a  meeting of the
Committee by a written consent signed by all members of the Committee.
 
    3.4   EFFECT OF COMMITTEE DETERMINATIONS. No member of the Committee or  the
Board  shall be personally liable  for any action or  determination made in good
faith with respect to the Plan or any Award or to any settlement of any  dispute
between  a Non-Employee  Director and  the Corporation.  Any decision  or action
taken  by  the  Committee  or  the  Board  with  respect  to  an  Award  or  the
administration  or interpretation  of the Plan  shall be  conclusive and binding
upon all persons.
 
                      ARTICLE IV -- AWARDS UNDER THE PLAN
 
    Awards in the form of Options shall be granted to Non-Employee Directors  in
accordance  with Article  VIII. Awards in  the form  of Options or  Shares, or a
combination thereof, may be granted to Non-Employee Directors in accordance with
Article IX. Each Option  granted under the  Plan shall be  evidenced by a  Stock
Option  Agreement in  such form  and containing  such terms  and conditions (not
inconsistent with the Plan) as the Committee shall adopt.
 
                            ARTICLE V -- ELIGIBILITY
 
    Non-Employee Directors of the Corporation  shall be eligible to  participate
in the Plan in accordance with Articles VIII and IX.
 
                    ARTICLE VI -- SHARES SUBJECT TO THE PLAN
 
    Subject  to adjustment as  provided in Article XII,  the aggregate number of
Shares which may be issued upon the award of Shares and the exercise of  Options
shall not exceed one hundred fifty thousand (150,000) Shares. To the extent that
Shares subject to an outstanding Option are not issued or delivered by reason of
the  expiration, termination,  cancellation or forfeiture  of such  Option or by
reason of the delivery of Shares (either actually or by attestation) to pay  all
or  a portion of the exercise price of such Option, then such Shares shall again
be available under the Plan.
 
                                      A-2
<PAGE>
                 ARTICLE VII -- NON-TRANSFERABILITY OF OPTIONS
 
    All  Options  granted  under  the  Plan  shall  not  be  transferable  by  a
Non-Employee  Director  during his  or  her lifetime  and  may not  be assigned,
exchanged, pledged, transferred or otherwise encumbered or disposed of except by
court order, will or  by the laws of  descent and distribution.  Notwithstanding
the  foregoing,  in the  event Options  may be  transferable without  failing to
comply with Rule 16b-3  under the Securities Exchange  Act of 1934, as  amended,
then  each Option shall be  transferable to the extent  set forth in the related
Stock Option  Agreement,  as determined  by  the Committee  (provided  that  all
Options  granted under Article VIII  with the same Option  Grant Date shall have
identical provisions relating to  the transferability of  such Options). In  the
event  that any Option  is thereafter transferred as  permitted by the preceding
sentence,  the  permitted  transferee  thereof  shall  be  deemed  the  Optionee
hereunder.  Options shall be exercisable during  the Optionee's lifetime only by
the Optionee  or by  the Optionee's  guardian, legal  representative or  similar
person.
 
                      ARTICLE VIII -- NON-ELECTIVE OPTIONS
 
    Each  Non-Employee  Director  shall  be  granted  Options,  subject  to  the
following terms and conditions.
 
    8.1   TIME OF GRANT. On the date of  the adoption of this Plan by the  Board
each  present Non-Employee Director shall be  granted an Option to purchase Five
Thousand (5,000)  Shares. Each  Non-Employee Director  who is  first elected  or
begins  to serve as a  Non-Employee Director after the  adoption of this Plan by
the Board shall be granted an Option to purchase Two Thousand (2,000) Shares  on
the  date he or she is  elected. On the first business  day of September of each
year (or, if later, on the date on which a person is first elected or begins  to
serve  as a Non-employee  director), each person who  is a Non-Employee Director
shall be automatically granted an Option to purchase One Thousand (1,000) Shares
which number shall be pro-rated if  such Non-Employee Director is first  elected
or  begins to serve as a Non-Employee Director  on a date other than the date of
an annual meeting of stockholders.
 
    8.2   PURCHASE PRICE. The purchase price per Share under each Option granted
pursuant to this Article shall be 100% of the Fair Market Value per Share on the
Option Grant Date.
 
    8.3   EXERCISE OF OPTIONS.  Each Option  shall be fully  exercisable on  and
after  that date which is six months after the Option Grant Date and, subject to
Article X, shall not be  exercisable prior to such date.  In no event shall  the
period  of time over which the Option may be exercised exceed ten years from the
Option Grant Date. An Option, or portion  thereof, may be exercised in whole  or
in part only with respect to whole Shares.
 
    Shares shall be issued to the Optionee pursuant to the exercise of an Option
only upon receipt by the Corporation from the Optionee of payment in full either
in  cash or by surrendering  (or attesting to the  ownership of) Shares together
with proof acceptable to the Committee that  such Shares have been owned by  the
Optionee for at least six months prior to the date of exercise of the Option, or
a  combination of cash and Shares, in an amount or having a combined value equal
to the aggregate purchase price for the Shares subject to the Option or  portion
thereof being exercised. The Shares issued to an Optionee for the portion of any
Option  exercised by attesting to  the ownership of Shares  shall not exceed the
number of Shares  issuable as a  result of such  exercise (determined as  though
payment  in full therefor were being made in cash) less the number of Shares for
which attestation of ownership is submitted. The value of owned Shares submitted
(directly or by attestation) in full or partial payment for the Shares purchased
upon exercise of an Option shall be equal to the aggregate Fair Market Value  of
such owned Shares on the date of the exercise of such Option.
 
    8.4   TERMINATION  OF SERVICE. In the event of the termination of service on
the Board by the holder of any Option by reason of voluntary resignation, (other
than for disability  or mandatory retirement)  or failure, as  a nominee, to  be
elected  at an annual  meeting of stockholders, the  then outstanding Options of
such holder shall  be exercisable  on their  stated exercisable  date and  shall
expire three years
 
                                      A-3
<PAGE>
after  such termination,  or on their  stated expiration  date, whichever occurs
first. In the case of  removal for cause, the  then outstanding Options of  such
holder shall be exercisable only to the extent that they were exercisable on the
date  of such removal and shall expire six months after such removal or on their
stated expiration date, whichever occurs first. Options that are not exercisable
on the date of such removal shall be forfeited.
 
    8.5   RETIREMENT. In  the  event of  termination  of service  by  reason  of
mandatory  retirement  pursuant to  Board policy,  the then  outstanding Options
shall be exercisable on their stated exercisable dates and shall expire on their
stated expiration dates. In the case of retirement prior to the retirement  date
required  by mandatory Board  policy, all Options  outstanding on the retirement
date shall be exercisable on their  stated exercisable date and shall be  expire
three  years  after the  retirement date,  or on  their stated  expiration date,
whichever comes first.
 
    8.6   DISABILITY. In  the  event of  termination  of service  by  reason  of
disability  (as defined herein), the outstanding Options shall be exercisable on
their stated  exercisable dates  and  shall expire  on their  stated  expiration
dates.  "Disability" as used herein shall mean an Optionee's inability to engage
in any  substantial  gainful  activity because  of  any  medically  determinable
physical  or mental impairment which can be expected to result in death or which
has lasted, or can be expected to last, for a continuous period of six months or
longer.
 
    8.7   DEATH. In the event of the death of the holder of any Option, each  of
the   then  outstanding  Options   of  such  holder   shall  become  immediately
exercisable, and shall be  exercisable by the holder's  beneficiary at any  time
until the expiration date of the Option (as may be adjusted pursuant to Sections
8.4   or  8.5).  Optionee  shall  designate  beneficiaries  in  accordance  with
procedures established by the Committee.
 
    8.8   PAYMENT OF TAX WITHHOLDING. In order to enable the Corporation to meet
any applicable federal, state or local withholding tax requirements arising as a
result of the exercise of an Option, the Optionee shall pay the Corporation  the
amount  of  tax  to be  withheld  or may  elect  to satisfy  such  obligation by
delivering to the Corporation Shares owned by the Optionee for six months  prior
to  exercising the Option, or by making  a payment to the Corporation consisting
of a combination of cash and such Shares. The value of any Share of common stock
delivered to the  Corporation pursuant  to this Section  8.8 shall  be the  Fair
Market  Value  on the  date to  be used  to determine  the amount  of tax  to be
withheld.
 
                   ARTICLE IX -- ELECTIVE OPTIONS AND SHARES
 
    Each Non-Employee  Director  shall  be  granted  Options  or  Shares,  or  a
combination thereof, subject to the following terms and conditions:
 
    9.1   TIME  OF GRANT. On the  first business day of  September of each year,
Options  or  Shares,  or  a  combination  thereof,  shall  be  granted  to  each
Non-Employee  Director who,  at least six  months prior thereto,  files with the
Committee or its designee a written election to receive Options or Shares, or  a
combination thereof, in lieu of all or a portion of such Non-Employee Director's
Annual  Retainer. In the event  a Non-Employee Director does  not file a written
election in  accordance with  the preceding  sentence by  reason of  becoming  a
Non-Employee  Director after  the date  which is six  months prior  to the first
business day  of September  in any  year, Options  or Shares,  or a  combination
thereof,  shall be granted to  such Non-Employee Director on  the first day (the
"Effective Date") which is six months after the date such Non-Employee  Director
files  with the Committee or its designee  a written election to receive Options
or Shares,  or a  combination thereof,  in  lieu of  all or  a portion  of  such
Non-Employee  Director's Annual Retainer; provided,  however, that such election
may apply only to  the portion of such  Non-Employee Director's Annual  Retainer
determined  by  multiplying such  Non-Employee Director's  Annual Retainer  by a
fraction, the numerator of which  is the number of  days from and including  the
Effective Date to and including the last day of the period for which such Annual
Retainer would otherwise be payable, and the denominator of which is 365 or 366,
as the case may be. An
 
                                      A-4
<PAGE>
election  pursuant to the first  sentence of this Section  9.1 may be revoked or
changed only on  or prior to  the date which  is six months  prior to the  first
business  day of  the following  September. An  election pursuant  to the second
sentence of this Section 9.1 shall be irrevocable.
 
    9.2   NUMBER AND TERMS OF OPTIONS. The number of Shares subject to an Option
granted pursuant to this Article  shall be the number  of whole Shares equal  to
(i)  the product of four (4) times the  portion of the Annual Retainer which the
Non-Employee Director has elected  pursuant to Section 9.1  shall be payable  in
Options,  divided by (ii)  the Fair Market  Value per Share  on the Option Grant
Date. Any fraction of a Share shall  be disregarded and the remaining amount  of
such  Annual Retainer shall be paid in  cash. The purchase price per share under
each Option granted pursuant to  this Article shall be  100% of the Fair  Market
Value  per Share on the Option Grant  date. Each Option granted pursuant to this
Article shall be  exercisable in accordance  with and subject  to the terms  and
provisions of Article VIII other than Section 8.1 thereof.
 
    9.3   NUMBER  OF  SHARES.  The Number  of  Shares granted  pursuant  to this
Article shall be  the number of  whole Shares equal  to (i) the  portion of  the
Annual  Retainer which the Non-Employee Director has elected pursuant to Section
9.1 shall be payable in Shares, divided by (ii) the Fair Market Value per  Share
on  the Stock Award Date.  Any fraction of a Share  shall be disregarded and the
remaining amount of such Annual Retainer shall be paid in cash. Upon an Award of
Shares to  a  Non-Employee Director,  the  stock certificate  representing  such
Shares  shall be issued and transferred  to the Non-Employee Director, whereupon
the Non-Employee Director  shall become  a stockholder of  the Corporation  with
respect to such Shares and shall be entitled to vote the Shares.
 
                         ARTICLE X -- CHANGE OF CONTROL
 
    10.1  EFFECT  OF  CHANGE OF  CONTROL.  Upon the  occurrence  of an  event of
"Change of Control",  as defined below,  any and all  outstanding Options  shall
become immediately exercisable.
 
    10.2  DEFINITION OF CHANGE CONTROL. A "Change of Control" shall occur when:
 
        (a)  the  stockholders of the Corporation approve a definitive agreement
             or plan  to  merge or  consolidate  the Corporation  with  or  into
    another corporation (other than a merger or consolidation which would result
    in  the  Voting  Stock (as  defined  below) of  the  Corporation outstanding
    immediately prior  thereto  continuing  to represent  (either  by  remaining
    outstanding  or by being  converted into voting  securities of the surviving
    entity) more than fifty percent of  the combined voting power of the  voting
    securities   of  the  Corporation  or   such  surviving  entity  outstanding
    immediately after such merger  or consolidation), or  to sell, or  otherwise
    dispose  of,  all or  substantially all  of  the Corporation's  property and
    assets, or to liquidate the Corporation; or
 
        (b)  the individuals who are Continuing Directors of the Corporation (as
             defined below)  cease  for any  reason  to constitute  at  least  a
    majority of the Board of the Corporation.
 
    The  term "Continuing Director" means  (i) any member of  the Board who is a
member of the Board  on September 1,  1995 or (ii)  any person who  subsequently
becomes  a member of the Board whose  nomination for election or election to the
Board is recommended or approved by a majority of the Continuing Directors.  The
term  "Voting Stock"  means all  capital stock of  the Corporation  which by its
terms may be voted on all  matters submitted to stockholders of the  Corporation
generally.
 
                    ARTICLE XI -- AMENDMENT AND TERMINATION
 
    The  Board may amend the Plan from time to time or terminate the Plan at any
time; provided,  however,  that  no  action authorized  by  this  Article  shall
adversely  change the terms and conditions  of an outstanding Option without the
Optionee's consent and, subject to Article XII, the number of Shares subject  to
an  Option granted under Article VIII, the  purchase price therefor, the date of
grant of any such Option and the termination provisions relating to such Option,
shall not be amended more
 
                                      A-5
<PAGE>
than once every six months,  other than to comply  with changes in the  Internal
Revenue  Code  of  1986, as  amended,  or  any successor  law,  or  the Employee
Retirement Income Security Act of 1974, as amended, or any successor law, or the
rules and regulations thereunder.
 
                      ARTICLE XII -- ADJUSTMENT PROVISIONS
 
    12.1  If the  Corporation shall  at any  time change  the number  of  issued
Shares  without new consideration to the Corporation (such as by stock dividend,
stock split, recapitalization, reorganization, exchange of shares,  liquidation,
combination or other change in corporate structure affecting the Shares) or make
a  distribution of cash or property which  has a substantial impact on the value
of issued Shares,  the total number  of Shares reserved  for issuance under  the
Plan  shall be appropriately adjusted  and the number of  Shares covered by each
outstanding Option  and the  purchase  price per  Share under  each  outstanding
Option  and  the  number of  Shares  underlying  Options to  be  issued annually
pursuant to Section 8.1  shall be adjusted so  that the aggregate  consideration
payable  to  the Corporation  and the  value of  each such  Option shall  not be
changed.
 
    12.2  Notwithstanding any other provision of the Plan, and without affecting
the number  of  Shares reserved  or  available hereunder,  the  Committee  shall
authorize  the issuance,  continuation or  assumption of  outstanding Options or
provide for other equitable  adjustments after changes  in the Shares  resulting
from  any  merger, consolidation,  sale of  assets,  acquisition of  property or
stock, recapitalization,  reorganization  or  similar occurrence  in  which  the
Corporation  is the  continuing or  surviving corporation,  upon such  terms and
conditions as it  may deem  necessary to  preserve Optionees'  rights under  the
Plan.
 
    12.3  In   the  case  of  any  sale  of  assets,  merger,  consolidation  or
combination of the  Corporation with or  into another corporation  other than  a
transaction  in which the Corporation is the continuing or surviving corporation
and which does  not result  in the outstanding  Shares being  converted into  or
exchanged  for different securities, cash or  other property, or any combination
thereof (an "Acquisition"), any Optionee  who holds an outstanding Option  shall
have  the  right (subject  to  the provisions  of  the Plan  and  any limitation
applicable to  the Option)  thereafter and  during the  term of  the Option,  to
receive  upon exercise thereof the  Acquisition Consideration (as defined below)
receivable upon the Acquisition by a holder of the number of Shares which  would
have  been obtained upon exercise of the  Option or portion thereof, as the case
may  be,  immediately   prior  to   the  Acquisition.   The  term   "Acquisition
Consideration"  shall mean the kind and amount of shares of the surviving or new
corporation, cash, securities, evidence of  indebtedness, other property or  any
combination  thereof receivable in respect of  one Share of the Corporation upon
consummation of an Acquisition.
 
                ARTICLE XIII -- COMPLIANCE WITH SEC REGULATIONS
 
    It is the  Corporation's intent that  the Plan comply  in all respects  with
Rule  16b-3 under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and any related regulations. If any provision of this Plan is later found
not to be in compliance with such  Rule and regulations, the provision shall  be
deemed  null and void. All grants and exercises of Options under this Plan shall
be executed in accordance  with the requirements of  Section 16 of the  Exchange
Act and regulations promulgated thereunder.
 
                    ARTICLE XIV -- MISCELLANEOUS PROVISIONS
 
    14.1  RIGHTS AS STOCKHOLDER. An Optionee under the Plan shall have no rights
as a holder of Corporation common stock with respect to Option grants hereunder,
unless  and  until certificates  for  shares of  such  stock are  issued  to the
Optionee, or such shares are credited to the Optionee's Account.
 
    14.2  COMPLIANCE WITH LEGAL REGULATIONS. During the term of the Plan and the
term of any Options granted under the  Plan, the Corporation shall at all  times
reserve  and keep available such  number of shares as  may be issuable under the
Plan, and shall seek to obtain from any regulatory body having jurisdiction  any
requisite  authority required in  the opinion of counsel  for the Corporation in
 
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<PAGE>
order to grant  Options to  purchase Shares of  Corporation common  stock or  to
issue  such  stock  pursuant thereto.  If  in  the opinion  of  counsel  for the
Corporation the transfer, issue  or sale of  any shares of  its stock under  the
Plan  shall  not  be lawful  for  any  reason, including  the  inability  of the
Corporation to obtain  from any  regulatory body  having jurisdiction  authority
deemed  by such counsel to be necessary  to such transfer, issuance or sale, the
Corporation shall not be obligated to  transfer, issue or sell any such  shares.
In  any event, the Corporation shall not be obligated to transfer, issue or sell
any shares to  any participant  unless a registration  statement which  complies
with  the provisions of the Securities Act  of 1933, as amended (the "Securities
Act"), is in effect at the time with respect to such Shares or other appropriate
action has been  take under  and pursuant  to the  terms and  provisions of  the
Securities  Act,  or  the  Corporation  receives  evidence  satisfactory  to the
Committee that the transfer, issuance or sale of such shares, in the absence  of
an  effective  registration statement  or  other appropriate  action,  would not
constitute a violation of the terms and provisions of the Securities Act.
 
    14.3  COSTS AND EXPENSES. The costs  and expenses of administering the  Plan
shall  be borne  by the  Corporation and  not charged  to any  Option or  to any
Non-employee Director receiving an Option.
 
                          ARTICLE XV -- EFFECTIVE DATE
 
    The Plan  shall be  submitted to  the stockholders  of the  Corporation  for
approval and, if approved by a majority of all the votes cast at the 1996 annual
meeting  of stockholders, shall become  effective as of the  date of approval by
the Board. If stockholder approval is not obtained at the 1996 annual meeting of
stockholders, the Plan shall be nullified.
 
                                      A-7
<PAGE>


                                 PROXY

                             HACH COMPANY

             ANNUAL MEETING OF SHAREHOLDERS - AUGUST 27, 1996
        THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

     The undersigned hereby appoint(s) KATHRYN HACH-DARROW, BRUCE J. HACH and 
ROBERT O. CASE, and each of them, each with the power of substitution, as 
proxies and agents (""Proxy Agents''), in the name of the undersigned to 
represent and to vote as designated below all of the shares of Common Stock 
of HACH COMPANY (the ""Company''), held of record by the undersigned on 
Wednesday, July 10, 1996, at the Annual Meeting of Shareholders to  be held 
on Tuesday, August 27, 1996, and any adjournment(s) thereof, the undersigned 
herewith ratifying all that the said Proxy Agents may so do. The undersigned 
further acknowledges receipt of the Notice of Annual Meeting and the Proxy 
Statement in support of the Board's solicitation of proxies dated July 22, 
1996.

     THIS PROXY, WHEN PROPERLY EXECUTED AND RETURNED TO THE COMPANY, WILL BE 
VOTED IN THE MANNER DIRECTED HEREIN BY THE UNDERSIGNED SHAREHOLDER(S). IF NO 
DIRECTION IS MADE, THIS PROXY WILL BE VOTED FOR PROPOSALS 1, 2 AND 3.

                                                 (continued on reverse side)


    PLEASE MARK VOTE IN OVAL IN THE FOLLOWING MANNER USING DARK INK ONLY

1. ELECTION OF SEVEN DIRECTORS:                    FOR all the        WITHHOLD
   (INSTRUCTION: To withhold authority for any    nominees listed    AUTHORITY
   individual nominee, strike a line through    (except as marked   to vote for
   the nominee's name in the list below)         to the contrary)  all nominees
                                                    / /                / /
   Kathryn Hach-Darrow, Bruce J. Hach,
   Joseph V. Schwan, Fred W. Wenninger,
   John N. McConnell, Linda O. Doty,
   Gary R. Dreher


2. PROPOSAL TO APPROVE THE AMENDMENT TO THE COMPANY'S    For   Against   Abstain
   CERTIFICATE OF INCORPORATION TO REDUCE THE            / /     / /       / /
   COMPANY'S AUTHORIZED COMMON STOCK.


3. PROPOSAL TO APPROVE THE COMPANY'S 1995 EMPLOYEE      For   Against    Abstain
   STOCK PURCHASE PLAN.                                 / /     / /       / /


4. In their discretion, the Proxy Agents are authorized to vote upon
   such other business as may properly come before the meeting.


PLEASE DATE AND SIGN exactly as name(s) appears hereon and return
promptly in the accompanying prepaid envelope. If shares are held by joint
tenants or as community property, both shareholders should sign.

Dated: ________________________________, 1996


_____________________________________________
                Signature

_____________________________________________
                Signature




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