What Does a Water Treatment Operator Do?
As long as people turn on a tap and expect clean water, plants will need operators to make sure every gallon is treated, tested and safe. Water treatment operators run the pumps, filters and chemical feeds that turn river, lake or well water into drinking water, and many also look after the plant's equipment. Plants often need round-the-clock staffing.
Also known as: Water Treatment Maintenance Specialist
Other Job Titles for This Work
Workers in this occupation report titles such as Plant Operator, Process Operator (Process Op), Relief Operator, Waste Water Treatment Plant Operator (WWTP Operator), Wastewater Operator (WW Operator), Wastewater Technician (Wastewater Tech), Water Control Dispatcher, Water Plant Operator.
Water Treatment Operator Duties and Responsibilities
The primary responsibilities of a water treatment operator include:
- Monitor treatment processes on the SCADA screen and adjust chemical feed rates as water quality changes.
- Collect samples and test turbidity, pH and chlorine residual at set intervals through each shift.
- Backwash filters and clean basins, clarifiers and intake screens on schedule.
- Handle chlorine, coagulants and other chemicals safely, and log every delivery and dose.
- Maintain pumps, chemical feeders and valves, and replace worn seals and tubing.
- Record flows, levels and lab results for the monthly reports sent to state regulators.
- Respond to alarms for low pressure, high turbidity or equipment failure at any hour.
- Calibrate analyzers and meters so readings stay accurate for compliance.
- Flush hydrants and dead-end mains to keep water fresh in the distribution system.
- Walk the plant each shift to check for leaks, odd noises and chemical spills.
Required Skills and Qualifications
To succeed as a water treatment operator, you will need the following skills and qualifications:
- State water treatment operator certification
- Basic chemistry and lab testing
- SCADA monitoring
- Math for chemical doses and flow rates
- Mechanical skills for pumps and feeders
- Careful, honest record keeping
- Alertness on overnight and weekend shifts
- Chemical safety and confined-space training
Education and Training
To run a public water plant, in most states you will need a state operator certificate, earned by passing exams and logging supervised hours at a plant. Operators usually come in with a high school diploma and learn on the job, though some start out by completing a water technology certificate at a community college. Higher certificate grades open bigger plants.
Salary and Job Outlook
Typical pay: $48,040 - $74,780 per year, with a median of $60,020.
The range covers the middle half of earners nationwide. Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025, Water and Wastewater Treatment Plant and System Operators.
Employment of water and wastewater treatment plant and system operators is projected to decline about 6 percent from 2025 to 2035, according to BLS, partly because automated controls let plants run with smaller crews. Retirements still leave about 10,000 openings a year, according to the same projections, and small towns often struggle to find certified operators.
Outlook source: U.S. Bureau of Labor Statistics, Employment Projections, 2025 to 2035, Water and wastewater treatment plant and system operators.
Water Treatment Operator Pay Range
| Earners | Annual pay |
|---|---|
| Bottom 10% earn less than | $39,110 |
| Bottom 25% earn less than | $48,040 |
| Median (half earn more, half less) | $60,020 |
| Top 25% earn more than | $74,780 |
| Top 10% earn more than | $91,060 |
Highest-Paying States for Water Treatment Operators
The states with the highest median pay for this occupation are California ($81,770), Nevada ($81,440), Washington ($80,800), Connecticut ($78,820), New Jersey ($78,760). Pay is lowest in Oklahoma ($45,890), Kentucky ($45,430), Arkansas ($44,320).
Median pay in all 50 states with BLS data
| State | Median annual pay |
|---|---|
| Alabama | $51,870 |
| Alaska | $60,160 |
| Arizona | $61,340 |
| Arkansas | $44,320 |
| California | $81,770 |
| Colorado | $74,200 |
| Connecticut | $78,820 |
| Delaware | $64,940 |
| Florida | $59,030 |
| Georgia | $48,930 |
| Hawaii | $65,560 |
| Idaho | $52,210 |
| Illinois | $67,810 |
| Indiana | $53,540 |
| Iowa | $60,990 |
| Kansas | $46,780 |
| Kentucky | $45,430 |
| Louisiana | $46,210 |
| Maine | $61,870 |
| Maryland | $61,870 |
| Massachusetts | $68,550 |
| Michigan | $59,270 |
| Minnesota | $74,670 |
| Mississippi | $46,480 |
| Missouri | $49,940 |
| Montana | $58,040 |
| Nebraska | $61,220 |
| Nevada | $81,440 |
| New Hampshire | $62,940 |
| New Jersey | $78,760 |
| New Mexico | $48,190 |
| New York | $63,990 |
| North Carolina | $51,680 |
| North Dakota | $60,470 |
| Ohio | $59,170 |
| Oklahoma | $45,890 |
| Oregon | $69,720 |
| Pennsylvania | $63,310 |
| Rhode Island | $61,820 |
| South Carolina | $52,090 |
| South Dakota | $53,370 |
| Tennessee | $50,670 |
| Texas | $49,460 |
| Utah | $61,290 |
| Vermont | $63,640 |
| Virginia | $59,420 |
| Washington | $80,800 |
| West Virginia | $47,560 |
| Wisconsin | $63,550 |
| Wyoming | $63,260 |
What the Work Is Like
O*NET surveys people who work as water and wastewater treatment plant and system operators about their daily conditions. Of those surveyed:
- 87% say teamwork is very or extremely important in their job
- 83% use email every day
- 83% say being exact and accurate is very or extremely important
- 82% are on the phone every day
- 70% work outdoors in all kinds of weather every day
- 67% wear safety gear such as gloves, safety glasses or a hard hat every day
- 54% use their hands on tools, objects or controls for more than half the day
Education Workers Say the Job Needs
| Education level | Share of workers |
|---|---|
| High school diploma or GED | 50% |
| Post-secondary certificate | 38% |
| Some college | 8% |
Tools and Software Water Treatment Operators Use
Tools and equipment
Software
Is This Job a Good Fit for You?
People who do well in this job tend to enjoy hands-on work with tools, machines or the outdoors as well as organized work with data, records and clear procedures.
Skills O*NET rates most important: Operation and Control, Operations Monitoring, Monitoring, Active Listening, Speaking, Equipment Maintenance.
Knowledge areas used most: Public Safety and Security, Mechanical, English Language, Chemistry, Administration and Management.
Preparation: O*NET places this occupation in Job Zone 2 of 5, which means some preparation.
Related Careers
These jobs use similar skills, according to O*NET's related-occupation data:
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Sources
- U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025.
- U.S. Bureau of Labor Statistics, Employment Projections, 2025 to 2035.
- O*NET 30.1 Database, occupation 51-8031.00 (Water and Wastewater Treatment Plant and System Operators). View on O*NET OnLine.
This page includes information from the O*NET 30.1 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET® is a trademark of USDOL/ETA. The Job Explorer has modified some of the information; USDOL/ETA has not approved, endorsed or tested these changes.