Safety & Environmental career

Water Treatment Plant Operator

Also called: Water Operator · Wastewater Treatment Operator · Water Plant Operator · Utility Operator

What water treatment plant operators do, what they earn, how long training takes and how to get started, with official BLS pay data and practical, job-level detail.

Updated By the Career Education Institute Curriculum Team
What does a water treatment plant operator do?

Water and wastewater treatment plant operators run the equipment and processes that make drinking water safe and clean wastewater before it returns to the environment: testing water, adjusting chemicals and maintaining systems. The median pay is $60,020 per year (BLS, May 2025), most people train for about Months to years (on the job + certification), and employment is projected to grow -5.7% from 2025–35.

Pay data: BLS OEWS, May 2025 · Outlook: BLS 2025–35 · Checked October 15, 2026

  • Median pay
    $60,020
    $28.86/hour · May 2025
  • Job growth
    -5.7%
    2025–35, a projected decline
  • Openings per year
    10,000
    Average, 2025–35
  • Typical entry education
    High school diploma or equivalent
    BLS classification
  • Time to train
    Months to years (on the job + certification)
    Typical program length
  • U.S. jobs
    131,000
    Employment, 2025

What water treatment plant operators do

Operators monitor treatment processes around the clock: adding chemicals for coagulation and disinfection, adjusting flows, reading SCADA screens, collecting and testing samples, maintaining pumps and equipment, and keeping records required by environmental regulations.

Every state requires certified operators for public water and wastewater systems, with certification levels tied to system size and complexity. Most operators learn on the job with a high school diploma, then advance by passing higher-level exams. These are stable public-service jobs with good benefits.

Typical duties

  • Monitor and adjust treatment processes and equipment
  • Add and adjust chemicals for coagulation, disinfection and pH control
  • Collect samples and perform laboratory tests
  • Read meters, gauges and SCADA displays
  • Maintain pumps, motors, valves and filters
  • Record data and prepare regulatory reports
  • Respond to alarms, emergencies and equipment failures

Work environment and schedule

Operators work at water and wastewater plants, lift stations and distribution systems, both indoors and outdoors. Work can involve chemicals, confined spaces, odors and wet conditions.

Schedule: Plants run 24/7, so operators often work rotating shifts, weekends and holidays, plus on-call duty.

A day in the life

  1. Shift handoff: review SCADA trends, chemical levels and overnight alarms.
  2. Walk the plant: check pumps, chemical feeders and filter performance.
  3. Collect samples and test chlorine residual, turbidity and pH in the plant lab.
  4. Backwash a filter after headloss reaches its setpoint.

See a full day in the life of a water treatment plant operator →

Water Treatment Plant Operator salary

Half of water treatment plant operators earned more than $60,020 and half earned less in May 2025. Pay ranged from about $39,110 for the lowest 10% to $91,060 for the top 10%.

Full water treatment plant operator pay scale and hourly rates →

How to become a water treatment plant operator

  1. Finish high school
  2. Get hired as an operator-in-training
  3. Gain experience and study
  4. Pass certification exams
  5. Advance

A high school diploma is typical, with long-term on-the-job training. All states require operators to be certified, usually by passing exams after meeting experience requirements. Some community colleges offer water technology programs.

Step-by-step guide to becoming a water treatment plant operator →

Skills and tools

Technical skills

  • Treatment processes
  • Water chemistry and lab testing
  • SCADA monitoring
  • Pump and equipment maintenance
  • Chemical handling and dosing math

People skills

  • Responsibility and reliability
  • Attention to detail
  • Problem-solving
  • Calm in emergencies

All water treatment plant operator skills and tools →

Pros and cons

Pros

  • Stable, essential public-service jobs
  • Learn on the job with a high school diploma
  • Good benefits, often with pensions
  • Clear advancement through certification levels

Cons

  • Rotating shifts and on-call duty
  • Exposure to chemicals and unpleasant conditions
  • High responsibility for public health
  • Retirements mean heavy training demands on new operators

Certifications and licenses

  • State water treatment operator certification: Required for public drinking water systems, with grades based on system complexity.
  • State wastewater treatment operator certification: Required for wastewater plants, also graded by level.
  • Water distribution or collection certifications: For operators working on pipe networks and lift stations.
  • CDL: Sometimes required for utility roles.

Career path

  1. Operator-in-Training: Learn processes and assist certified operators.
  2. Certified Operator: Run processes and equipment on shift.
  3. Lead or Chief Operator: Supervise shifts and optimize processes.
  4. Plant Superintendent or Utility Manager: Manage facilities and compliance.

Learn the job before day one

Our Water Treatment Plant Operator training (10 hours, $89.99) covers the role, 15+ key terms, step-by-step procedures such as measure chlorine residual with a colorimeter and backwash a filter, safety and how to land your first job.

View Water Treatment Plant Operator trainingIs this career right for me?

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Compare: Water Operator vs. Environmental Technician · Water Operator vs. Maintenance Technician · Water Operator vs. Plumber · Water Operator vs. Hazmat Technician

Water Treatment Plant Operator FAQ

Do water treatment operators need a license?

Yes. All states require certified operators for public water and wastewater systems, with certification grades based on system size and complexity.

Can I become an operator without a degree?

Yes. A high school diploma is typical, and most operators learn on the job while working toward certification.

Is water treatment a stable career?

Yes. Water and wastewater service is essential, and many utilities offer strong benefits. BLS projects employment to decline slightly through 2035, but retirements still create openings.

How much does a water treatment plant operator make?

The median annual wage for water treatment plant operators was $60,020 ($28.86 per hour) in May 2025, according to the U.S. Bureau of Labor Statistics. The lowest 10% earned less than $39,110 and the highest 10% earned more than $91,060.

How long does it take to become a water treatment plant operator?

Most people need about Months to years (on the job + certification) of training. A high school diploma is typical, with long-term on-the-job training. All states require operators to be certified, usually by passing exams after meeting experience requirements. Some community colleges offer water technology programs.

Do you need a degree to be a water treatment plant operator?

No four-year degree is typically required. BLS lists “high school diploma or equivalent” as the typical entry-level education, plus long-term on-the-job training.

More water treatment plant operator questions →

Sources

Reviewed by the Career Education Institute Curriculum Team. Pay figures are national estimates; local pay varies. See our editorial policy.

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