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 MISSOURI

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          Rank Region 2025 Employment
          1 St. Louis, MO-IL Metro Area 1,220
          2 Kansas City, MO-KS Metro Area 740
          3 Central Missouri Balance of State 390
          4 North Missouri Balance of State 380
          5 Southeast Missouri Balance of State 320
          6 Southwest Missouri Balance of State 190
          7 Springfield, MO Metro Area 150
          8 Joplin, MO-KS Metro Area 100
          9 Columbia, MO Metro Area 90
          10 St. Joseph, MO-KS Metro Area 90
          11 Jefferson City, MO Metro Area 70
          12 Cape Girardeau, MO-IL Metro Area 60