100+ Free OK Water/Wastewater Operator Practice Questions
Pass your Oklahoma Water and Wastewater Operator Certification exam on the first try — instant access, no signup required.
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About the OK Water/Wastewater Operator Exam
The Oklahoma water and wastewater operator certification exam covers OAC 252:710, ODEQ regulations, water treatment processes, wastewater treatment including activated sludge and lagoon systems, distribution and collection systems, pump operations, laboratory testing, and safety procedures.
Questions
100 scored questions
Time Limit
2-3 hours
Passing Score
70%
Exam Fee
Varies by certification class (Oklahoma Department of Environmental Quality (ODEQ))
OK Water/Wastewater Operator Exam Content Outline
State Laws & Regulations
OAC 252:710, ODEQ certification classes A-D, experience requirements, and NPDES compliance
Water Treatment
Coagulation, filtration, disinfection, groundwater treatment, and fluoridation
Wastewater Treatment
Activated sludge, lagoon systems, sludge handling, and nutrient removal
Distribution & Collection
Pumps, valves, hydrants, force mains, cross-connections, and I/I management
Laboratory & Safety
Sampling procedures, quality testing, record-keeping, OSHA compliance, and confined space entry
How to Pass the OK Water/Wastewater Operator Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 2-3 hours
- Exam fee: Varies by certification class
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Frequently Asked Questions
What are Oklahoma's operator certification levels?
Oklahoma uses Classes A, B, C, and D for both waterworks and wastewater works, with D as entry level and A as the highest. Class A requires 5 years of experience including 2 years hands-on.
How do I apply for the Oklahoma water operator exam?
Applications must be completed online through the ODEQ Water & Wastewater Operator Certification Portal at least 21 days before the certification class start date.
Can education substitute for ODEQ training requirements?
Yes — an associate's degree or greater in chemistry, biology, engineering, or related fields can substitute for the 32 hours of ODEQ-approved C-level training.