Wastewater Treatment Plant Operator I (20251753)

Public Works
Public Works
Central Valley
Until filled
$20.86-$26.70 Hourly

Please review the special instructions before applying for this job opportunity.


City of Chowchilla Wastewater Treatment Plan, 93610



Wastewater Treatment Plant Operator I

($20.86 – 26.70 per hour)


The City of Chowchilla is seeking a Wastewater Treatment Plant Operator I for the operation and maintenance of the City’s Wastewater Treatment Plant. The Wastewater Treatment Plant Operator I is a journey-level class in the Wastewater Treatment Plant series, which normally works under general supervision, performing a group of related duties according to established procedures.  This position reports to the Utility Systems or Wastewater System Supervisor and does not supervise. 

Ideal Candidate


Experience and Education:

  1. Any combination equivalent to experience and education that could likely provide the required knowledge, skill, and abilities is qualifying.  Typical knowledge, skill, and abilities are:
    1. Previous experience as a Wastewater Treatment Plant (WWTP) Operator.
    2. Specialized training in wastewater operations.
  2. Special Requirements:
    1. Possession of a State Water Resource Control Board Grade I Wastewater License.
    2. Possession of or ability to obtain a valid California Driver’s License by time of appointment.
    3. Ability to work swing shifts, weekends, and holidays.
    4. Must report to the work site within forty (40) minutes after receiving notification of being called back.

Knowledge of:  Basic principles and procedures of wastewater treatment, with specific emphasis on procedures involved in operations and maintenance of percolation ponds and secondary treatment plants.  Basin principles and procedures of wastewater and stormwater collection systems.  Methods, materials, and equipment used in the operation and maintenance of a wastewater treatment facility.  Basic laboratory procedures and analysis.  Safe work practices and basic computer skills.

Ability to: Perform routine mathematical calculations. Follow oral and written directions. Develop and maintain effective working relationships and operate heavy equipment. 

Physical Standards:  Positions in this class require moderate to heavy physical work with prolonged standing, walking, bending, stooping, climbing, lifting, and carrying loads weighing up to 95 pounds.  Positions may also involve fieldwork, resulting in exposure to the weather and exposure to disease-causing bacteria. 

Essential Responsibilities

  1. Assists in the operation of valves and other related controls to distribute flow-through unit process and application of chlorine and chemicals to the wastewater. 
  2. Monitors control equipment such as pumps, motors, valves, blowers, sludge collectors, heat exchangers, sludge thickeners, and other related process equipment. 
  3. Reads meters, gauges, and other instrumentation.
  4. Maintains a daily record of facility operation, samples collected, and corrections to unit processes.
  5. Adjusts or alters the chemical treatment of the plant as necessary.
  6. Collects samples for observation and analysis from unit processes.
  7. Performs daily and weekly laboratory analysis as needed for process adjustments and performance indicators.
  8. Performs preventative maintenance to equipment, such as routine service, lubrication, and cleaning of process equipment and machinery.
  9. Operates a wide variety of tools and equipment used in minor mechanical repair and operation of process equipment.
  10. Assists in minor repairs to all process equipment as needed.
  11. Performs building and ground maintenance, which may involve weed control, gardening, and janitorial services. 
  12. Performs related duties as assigned.



  • Holidays - The City recognizes 11 days each calendar year plus 2 floating holidays.
  • Vacation - Employees earn 3.70 hours of vacation per pay period for the first three years and increase to the maximum of 9.23 hours per pay period.  Vacation is capped at 2 years’ worth of accruals. 
  • Sick Leave - 3.70 hours earned per pay period with no maximum accrual cap.
  • Retirement - Employees are members of the California Public Employees Retirement System (CalPERS). The city does not participate in Social Security.
  • Health Insurance - Employee pays a portion for employee and dependent coverage of medical, dental, health, and life insurance.
  • Medicare - City pays 1.45% of salary; employee pays 1.45% of salary.
  • SDI - 1% of salary paid by the employee.
  • Deferred Compensation - CalPERS 457 Deferred Compensation program is available for employee participation.
  • Additional - Longevity is 2.5% for every 5 years of full-time service; City pays all state-mandated training and licenses; pet insurance is available.

Special Instructions


Candidates are encouraged to submit an application, any related documents, and any required certification(s) if applicable, through Applications are available at and from the City website at

The City of Chowchilla is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, gender identity, sexual orientation, national origin, ethnicity, political affiliation, age, marital status, medical condition, or disability. The City of Chowchilla makes reasonable accommodations for the disabled. If you believe you require special accommodations in the testing process, you must inform the City of Chowchilla in writing prior to the testing. Applicants that request such accommodations must document their request with an explanation of the type and extent of accommodations required.

Candidates considered to be best qualified based on the information provided will move forward in the recruitment process.

The provisions in this bulletin do not constitute an expressed or implied contract. Any provision contained in this bulletin may be modified or revoked at any time.

Recruitment Contact

Contact phone: 
Contact phone extension: