Ohio Water/Wastewater Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the Ohio Water/Wastewater Operator Vocabulary Game
A free word game for the Ohio Water/Wastewater Operator exam. Each round shows a clue for one of 20 exam terms across 8 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the Ohio Water/Wastewater Operator Vocabulary Game
State rules and certification
Drinking water limits
Wastewater permits
Drinking water treatment
Wastewater treatment
Collection systems
Laboratory analysis
Workplace hazards
Sources for these terms (20)
- Announcements · Source checked 2026-11-04
- DDAGW Effective Rules · Source checked 2026-11-04
- 3745-7-07 - Professional operator in training · Source checked 2026-11-04
- Exam information · Source checked 2026-11-04
- Operator · Source checked 2026-11-04
- Combined Sewer Overflows (CSOs) · Source checked 2026-11-04
- National Pollutant Discharge Elimination System (NPDES) · Source checked 2026-11-04
- National Primary Drinking Water Regulations · Source checked 2026-11-04
- 5.2 Dissolved Oxygen and Biochemical Oxygen Demand (Monitoring & Assessment, EPA archive) · Source checked 2026-11-04
- Glossary of Acronyms & Technical Terms (EPA archive) · Source checked 2026-11-04
- 1910.147 - The control of hazardous energy (lockout/tagout) · Source checked 2026-11-04
- 1910.134 - Respiratory protection · Source checked 2026-11-04
- Hazard Communication Standard: Safety Data Sheets (OSHA 3514) · Source checked 2026-11-04
- Overview of Drinking Water Treatment Technologies · Source checked 2026-11-04
- Wastewater Technology Fact Sheet: Package Plants (EPA 832-F-00-016, September 2000) · Source checked 2026-11-04
- Primary Clarifiers (EPA Operator Webinar Series, August 24, 2023) · Source checked 2026-11-04
- Optimize Your Wastewater Plant Operations; Save Energy - Save Money; Reduce Nutrient Discharge (EPA webinar, October 21, 2021) · Source checked 2026-11-04
- Industrial Uses for Fats, Oils, and Grease · Source checked 2026-11-04
- Sanitary Sewer Overflows (SSOs) · Source checked 2026-11-04
- 40 CFR 141.2 - Definitions (National Primary Drinking Water Regulations) · Source checked 2026-11-04
About the OH Water/Wastewater Operator Exam
Ohio water and wastewater operator certification uses class-specific WPI exams for water supply, water distribution, wastewater treatment (water reclamation) and wastewater collection: 100 scored items in 3 hours for Class I–III and 50 items in 2 hours for Class A. Ohio EPA gives its own Class IV exam; certification follows OAC 3745-7.
Exam sponsor: Ohio Environmental Protection Agency (Ohio EPA). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
3 hours (Class I–III); 2 hours (Class A)
Passing Score
70%
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the OH Water/Wastewater Operator vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the OH Water/Wastewater Operator vocabulary game work?
Each round shows a clue for one of 20 OH Water/Wastewater Operator terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the OH Water/Wastewater Operator terms come from?
OpenExamPrep researched each term from the Ohio Environmental Protection Agency (Ohio EPA) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What certification classes does Ohio offer for water operators?
Ohio certifies water supply and wastewater treatment (water reclamation) operators at Class A, I, II, III and IV, and water distribution and wastewater collection operators at Class I and II. Operators can hold OIT (operator in training) status for Class A, I, II or III after passing the exam but before completing the experience requirement.
How do I schedule the Ohio water operator exam?
Ohio EPA exams are administered through Water Professionals International (WPI) via the PSI online portal at test-takers.psiexams.com/abc-oh. The application fee is $45 non-refundable.