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 UNITED STATES

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          Rank Region 2025 Employment
          1 United States 128,490
          2 California 11,630
          3 Texas 10,520
          4 Florida 7,440
          5 Ohio 5,870
          6 New York 5,300
          7 Pennsylvania 4,660
          8 Arizona 3,950
          9 North Carolina 3,620
          10 Illinois 3,500
          11 Virginia 3,460
          12 Michigan 3,400
          13 Georgia 3,310
          14 Indiana 3,140
          15 Tennessee 3,140
          16 Missouri 3,000
          17 Alabama 2,770
          18 South Carolina 2,650
          19 Colorado 2,620
          20 Kentucky 2,540
          21 Massachusetts 2,510
          22 New Jersey 2,500
          23 Louisiana 2,450
          24 Iowa 2,370
          25 Minnesota 2,290
          26 Oklahoma 2,280
          27 Wisconsin 2,230
          28 New Mexico 2,110
          29 Washington 2,030
          30 Arkansas 2,010
          31 Utah 1,900
          32 Maryland 1,770
          33 Kansas 1,560
          34 Idaho 1,480
          35 Oregon 1,240
          36 Mississippi 1,150
          37 West Virginia 1,100
          38 South Dakota 1,060
          39 Puerto Rico 1,030
          40 Connecticut 980
          41 Alaska 750
          42 Nebraska 740
          43 Maine 710
          44 Montana 690
          45 Hawaii 610
          46 North Dakota 550
          47 New Hampshire 510
          48 Wyoming 500
          49 Rhode Island 420
          50 Delaware 340
          51 Vermont 320
          52 Virgin Islands 30
          53 American Samoa No Data Available
          54 District of Columbia No Data Available
          55 Guam No Data Available
          56 Nevada No Data Available
          57 Northern Mariana Islands No Data Available