The median annual wage for Water and Wastewater Treatment Plant and System Operators in Olympia-Lacey-Tumwater, WA is $85,000 (May 2024 BLS OES). The mean (average) is $83,390.
Pay spans roughly $62,440 at the 10th percentile to $98,250 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $40.86 per hour. An estimated 70 people work as water and wastewater treatment plant and system operators in Olympia-Lacey-Tumwater, WA.
| Median (annual) | $85,000 |
| Mean (annual) | $83,390 |
| Median (hourly) | $40.86 |
| 10th percentile | $62,440 |
| 90th percentile | $98,250 |
| Employment | 70 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.