Salary guide
Water Treatment Plant Operator Salary & Pay Scale (2026)
What water treatment plant operators earn per year, per hour and per month, with the full percentile range, the factors that move pay and how to earn more.
The median water treatment plant operator salary in the U.S. is $60,020 per year, or $28.86 per hour, based on Bureau of Labor Statistics data for May 2025. The lowest-paid 10% earned under $39,110, while the top 10% earned more than $91,060.
Pay data: BLS OEWS, May 2025 · Outlook: BLS 2025–35 · Checked October 15, 2026
Water Treatment Plant Operator pay scale
| Percentile | Annual | Hourly* | What it usually reflects |
|---|---|---|---|
| 10th percentile | $39,110 | $18.80 | Typical for new workers, part-time markets and lower-paying settings |
| 25th percentile | $48,040 | $23.10 | Early career, a year or two of experience |
| Median (50th) | $60,020 | $28.86 | Mid-career: half earn more, half earn less |
| 75th percentile | $74,780 | $35.95 | Experienced workers, specialists and higher-paying employers |
| 90th percentile | $91,060 | $43.78 | Top earners: senior, specialized, supervisory or high-cost areas |
*Hourly figures are annual wages divided by 2,080 hours. Percentile descriptions are general patterns, not guarantees.
Monthly and biweekly pay
| Pay period | At 25th percentile | At median | At 75th percentile |
|---|---|---|---|
| Per year | $48,040 | $60,020 | $74,780 |
| Per month | $4,003 | $5,002 | $6,232 |
| Every two weeks | $1,848 | $2,308 | $2,876 |
| Per week | $924 | $1,154 | $1,438 |
Gross pay before taxes and deductions.
What affects water treatment plant operator pay
- Required credentials (HAZWOPER, CSP, state inspector or operator licenses)
- Government versus private-sector employment
- Hazard level and emergency-response duties
- Industry (construction, energy, chemical and federal contracting)
- Geography and cost of living: metropolitan areas and some states pay well above the national median
How to earn more as a water treatment plant operator
- Get credentialed: State water treatment operator certification, State wastewater treatment operator certification, Water distribution or collection certifications.
- Build specialty experience: Run processes and equipment on shift.
- Move up: roles such as lead or chief operator and plant superintendent or utility manager typically pay more.
- Negotiate: research local pay and use our salary negotiation guide.
Water Treatment Plant Operator pay vs. related careers
Job outlook
BLS projects employment of water treatment plant operators to change by -5.7% from 2025–35, a projected decline compared with the 3.5% average for all occupations. About 10,000 openings are projected each year, on average, including openings to replace workers who retire or change occupations.
About this data
Figures come from the BLS Occupational Employment and Wage Statistics survey (May 2025), which covers wage and salary workers nationwide under SOC code 51-8031 (“Water and wastewater treatment plant and system operators”). Wages exclude self-employment income, overtime and most bonuses unless they are part of regular pay. We refresh these numbers when BLS releases new estimates each spring.
Water Treatment Plant Operator salary FAQ
How much does a water treatment plant operator make per hour?
The median hourly wage for water treatment plant operators was $28.86 in May 2025 (BLS). Hourly pay for the lowest 10% was about $18.80 and the top 10% earned about $43.78 or more.
How much does a water treatment plant operator make a month?
At the median annual wage of $60,020, that works out to about $5,002 per month before taxes, or about $2,308 every two weeks.
What is the starting salary for a water treatment plant operator?
New water treatment plant operators often start near the lower end of the range. The 10th percentile was $39,110 and the 25th percentile was $48,040 per year in May 2025. Starting pay depends on location, employer and credentials.
How can water treatment plant operators earn more?
Common ways include earning State water treatment operator certification and State wastewater treatment operator certification, gaining specialty experience, taking shifts or roles with premium pay, and moving up the career ladder to roles such as lead or chief operator.
Sources
- U.S. Bureau of Labor Statistics, BLS Occupational Employment and Wage Statistics (OEWS), May 2025, SOC 51-8031 (Water and wastewater treatment plant and system operators).
- U.S. Bureau of Labor Statistics, BLS Employment Projections, Table 1.2 (2025–35).
- O*NET OnLine summary for Water and wastewater treatment plant and system operators (U.S. Department of Labor).
- BLS Occupational Outlook Handbook.
Reviewed by the Career Education Institute Curriculum Team. Pay figures are national estimates; local pay varies. See our editorial policy.