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 IOWA

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          Rank Region 2025 Employment
          1 Southeast Iowa Balance of State 460
          2 Northwest Iowa Balance of State 410
          3 Des Moines-West Des Moines, IA Metro Area 330
          4 Northeast Iowa Balance of State 270
          5 Omaha, NE-IA Metro Area 240
          6 Davenport-Moline-Rock Island, IA-IL Metro Area 220
          7 Southwest Iowa Balance of State 190
          8 Cedar Rapids, IA Metro Area 130
          9 Waterloo-Cedar Falls, IA Metro Area 120
          10 Iowa City, IA Metro Area 110
          11 Sioux City, IA-NE-SD Metro Area 80
          12 Ames, IA Metro Area 70
          13 Dubuque, IA Metro Area 60