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 WASHINGTON

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          Rank Region 2025 Employment
          1 Seattle-Tacoma-Bellevue, WA Metro Area 830
          2 Portland-Vancouver-Hillsboro, OR-WA Metro Area 450
          3 Western Washington Balance of State 290
          4 Spokane-Spokane Valley, WA Metro Area 130
          5 Eastern Washington Balance of State 120
          6 Bremerton-Silverdale-Port Orchard, WA Metro Area 90
          7 Mount Vernon-Anacortes, WA Metro Area 90
          8 Yakima, WA Metro Area 90
          9 Bellingham, WA Metro Area 80
          10 Kennewick-Richland, WA Metro Area 80
          11 Lewiston, ID-WA Metro Area 70
          12 Olympia-Lacey-Tumwater, WA Metro Area 70
          13 Wenatchee-East Wenatchee, WA Metro Area 40
          14 Longview-Kelso, WA Metro Area 30
          15 Walla Walla, WA Metro Area No Data Available