The median annual wage for Water and Wastewater Treatment Plant and System Operators in Milwaukee-Waukesha, WI is $64,960 (May 2024 BLS OES). The mean (average) is $64,800.
Pay spans roughly $50,280 at the 10th percentile to $80,720 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $31.23 per hour. An estimated 420 people work as water and wastewater treatment plant and system operators in Milwaukee-Waukesha, WI.
| Median (annual) | $64,960 |
| Mean (annual) | $64,800 |
| Median (hourly) | $31.23 |
| 10th percentile | $50,280 |
| 90th percentile | $80,720 |
| Employment | 420 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.