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 PENNSYLVANIA

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          Rank Region 2025 Employment
          1 Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metro Area 1,650
          2 Pittsburgh, PA Metro Area 1,020
          3 Allentown-Bethlehem-Easton, PA-NJ Metro Area 320
          4 Harrisburg-Carlisle, PA Metro Area 280
          5 Lancaster, PA Metro Area 260
          6 Scranton--Wilkes-Barre, PA Metro Area 200
          7 Reading, PA Metro Area 190
          8 York-Hanover, PA Metro Area 180
          9 Central Pennsylvania Balance of State 170
          10 Southwestern Pennsylvania Balance of State 170
          11 Northwestern Pennsylvania Balance of State 150
          12 Erie, PA Metro Area 120
          13 Northeastern Pennsylvania Balance of State 110
          14 State College, PA Metro Area 110
          15 Chambersburg, PA Metro Area 90
          16 Altoona, PA Metro Area 70
          17 Johnstown, PA Metro Area 70
          18 Williamsport, PA Metro Area 50
          19 Lebanon, PA Metro Area 40
          20 Gettysburg, PA Metro Area No Data Available