The median annual wage for Water and Wastewater Treatment Plant and System Operators in Maryland is $58,740 (May 2024 BLS OES). The mean (average) is $61,920.
Pay spans roughly $40,750 at the 10th percentile to $94,920 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $28.24 per hour. An estimated 1,630 people work as water and wastewater treatment plant and system operators in Maryland.
| Median (annual) | $58,740 |
| Mean (annual) | $61,920 |
| Median (hourly) | $28.24 |
| 10th percentile | $40,750 |
| 90th percentile | $94,920 |
| Employment | 1,630 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.