Employment data are from the U.S. Department of Labor's Bureau of Labor Statistics, Occupational Employment and Wage Statistics and Employment Projections programs. State-level projections data are from Projections Central and State Labor Market Information offices.

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          Current Employment for Water and Wastewater Treatment Plant and System Operators in WISCONSIN

          Rank Region 2025 Employment
          1 Minneapolis-St. Paul-Bloomington, MN-WI Metro Area 1,010
          2 Milwaukee-Waukesha, WI Metro Area 440
          3 South Central Wisconsin Balance of State 320
          4 Northeastern Wisconsin Balance of State 290
          5 Duluth, MN-WI Metro Area 180
          6 Madison, WI Metro Area 150
          7 Green Bay, WI Metro Area 140
          8 Northwestern Wisconsin Balance of State 130
          9 Western Wisconsin Balance of State 110
          10 Appleton, WI Metro Area 90
          11 Eau Claire, WI Metro Area 80
          12 Oshkosh-Neenah, WI Metro Area 80
          13 La Crosse-Onalaska, WI-MN Metro Area 60
          14 Janesville-Beloit, WI Metro Area 50
          15 Racine-Mount Pleasant, WI Metro Area 50
          16 Sheboygan, WI Metro Area 50
          17 Wausau, WI Metro Area 50
          18 Fond du Lac, WI Metro Area 40
          19 Kenosha, WI Metro Area 30