The median annual wage for Water and Wastewater Treatment Plant and System Operators in Kennewick-Richland, WA is $78,020 (May 2024 BLS OES). The mean (average) is $72,980.
Pay spans roughly $53,760 at the 10th percentile to $87,860 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $37.51 per hour. An estimated 90 people work as water and wastewater treatment plant and system operators in Kennewick-Richland, WA.
| Median (annual) | $78,020 |
| Mean (annual) | $72,980 |
| Median (hourly) | $37.51 |
| 10th percentile | $53,760 |
| 90th percentile | $87,860 |
| Employment | 90 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.