Water and Wastewater Treatment Plant and System Operators Salary in Washington
Also called: Water Treatment Plant Operators
Water and Wastewater Treatment Plant and System Operators in Washington earn a median of $80,800 a year, +35% compared with the U.S. median.
Updated October 2026 · Data: BLS OEWS May 2025 · How we match careers
- Median pay
- $80,800
- vs. U.S. median
- +35% ($60,020)
- Rank among states
- 3 of 50
- Jobs in the state
- 2,030
Pay range in Washington
The lowest-paid 10% earn under $57,720; the top 10% earn over $106,270. Nationally the range is $39,110 to $91,060.
States ranked near Washington
Similar jobs in Washington
- Biomass Plant Technicians$131,620 median in Washington (broader BLS group)
- Gas Compressor and Gas Pumping Station Operators$57,500 median in Washington
- Gas Plant Operators$83,650 median in Washington
- Petroleum Pump System Operators, Refinery Operators, and Gaugers$103,620 median in Washington
- Biofuels Processing Technicians$88,730 median in Washington (broader BLS group)
- Hydroelectric Plant Technicians$131,620 median in Washington (broader BLS group)
Water and Wastewater Treatment Plant and System Operators pay in Washington
How much do water and wastewater treatment plant and system operators make in Washington?
The median is $80,800 a year. The lowest-paid 10% earn under $57,720 and the top 10% earn over $106,270. BLS OEWS May 2025.
Is Washington a good state for water and wastewater treatment plant and system operators?
On pay alone it ranks 3 of 50 (+35% vs. the national median of $60,020). Living costs are not included.