Water and Wastewater Treatment Plant and System Operators Salary in Washington

BLS OEWS May 2025 • 14 metro areas • Washington

Water and Wastewater Treatment Plant and System Operators in Washington earn a median salary of $75,261 per year on average across 14 metro and nonmetro areas, +29.2% vs the national median of $58,260. An estimated 3,330 water and wastewater treatment plant and system operators are employed across Washington, with salaries ranging from $63,410 to $88,440 depending on location.

$75,261 Avg median salary in Washington
$88,440 Highest paying metro
$63,410 Lowest paying metro
3,330 Employed in Washington

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      Water and Wastewater Treatment Plant and System Operators salaries by city in Washington

      Metro area Median salary 25th pct 75th pct Employed
      Seattle, WA $88,440 $76,390 $100,650 730
      Olympia, WA $85,000 $75,310 $97,540 70
      Mount Vernon, WA $81,730 $64,760 $98,920 80
      Bellingham, WA $78,690 $68,010 $87,560 100
      Kennewick, WA $78,020 $62,860 $82,290 90
      Spokane, WA $77,750 $60,850 $78,730 130
      Wenatchee, WA $77,660 $63,920 $85,230 50
      Bremerton, WA $76,620 $63,720 $84,060 90
      Eastern Washington $71,720 $61,320 $77,520 110
      Washington, DC-VA-MD-WV $69,460 $60,220 $81,930 1,450
      Western Washington $69,300 $58,390 $81,700 290
      Yakima, WA $69,120 $58,760 $81,330 80
      Walla Walla, WA $66,740 $65,970 $73,710 30
      Longview, WA $63,410 $62,340 $83,010 30

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