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EXHIBIT 21
MPW INDUSTRIAL SERVICES GROUP, INC.
LIST OF SUBSIDIARIES
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<CAPTION>
JURISDICTION OF
NAME ORGANIZATION
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<S> <C>
Aquatech Environmental, Inc. Michigan
ESI International, Inc. Ohio
ESI-North Limited Ohio
MPW Industrial Cleaning Corp. Ohio
MPW Industrial Services of Indiana, LLC Indiana
MPW Industrial Services, Inc. Ohio
MPW Management Services Corp. Ohio
MPW Container Management Corp. Ohio
MPW Container Management Corp. of Michigan Michigan
MPW Filtration Management Services Corp. Ohio
Gauthier Enterprises, Inc. Michigan
MPW Industrial Services, Ltd. Canada
MPW Industrial, L.L.C. of V.C. Mexico
MPW Industrial Water Services, Inc. Ohio
Pentagon Technologies Group, Inc. Ohio
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