Missouri Water/Wastewater Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the Missouri Water/Wastewater Operator Vocabulary Game
A free word game for the Missouri 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 Missouri Water/Wastewater Operator Vocabulary Game
Drinking water regulations
Wastewater rules
Drinking water treatment
Laboratory analysis
Workplace hazards
Wastewater treatment
Collection systems
Missouri regulations
Sources for these terms (21)
- Basic Information about Sewage Sludge and Biosolids · Source checked 2026-11-04
- 5.2 Dissolved Oxygen and Biochemical Oxygen Demand (Monitoring & Assessment, EPA archive) · Source checked 2026-11-04
- Stage 1 and Stage 2 Disinfectants and Disinfection Byproducts Rules · Source checked 2026-11-04
- Industrial Uses for Fats, Oils, and Grease · Source checked 2026-11-04
- Glossary of Acronyms & Technical Terms (EPA archive) · 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
- Optimize Your Wastewater Plant Operations; Save Energy - Save Money; Reduce Nutrient Discharge (EPA webinar, October 21, 2021) · Source checked 2026-11-04
- Reducing PFAS in Drinking Water with 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
- Sanitary Sewer Overflows (SSOs) · Source checked 2026-11-04
- Overview of Drinking Water Treatment Technologies · Source checked 2026-11-04
- 5.5 Turbidity (Monitoring & Assessment, EPA archive) · Source checked 2026-11-04
- 1910.132 - General requirements (Personal Protective Equipment) · Source checked 2026-11-04
- 40 CFR 141.2 - Definitions (National Primary Drinking Water Regulations) · Source checked 2026-11-04
- History of the Missouri Department of Natural Resources · Source checked 2026-11-04
- Drinking Water and Wastewater Operator Certification · Source checked 2026-11-04
- Combined Sewer Overflows (CSOs) · Source checked 2026-11-04
- Lead and Copper Rule · Source checked 2026-11-04
- Process Control Tests for Activated Sludge Domestic Wastewater Treatment Facilities (RG-002, revised November 2020) · Source checked 2026-11-04
About the MO Water/Wastewater Operator Exam
The Missouri water and wastewater operator certification exam covers state-specific regulations under 10 CSR 60-14 and 10 CSR 20-9, water treatment processes, wastewater treatment operations, distribution and collection systems, laboratory testing, and safety procedures.
Exam sponsor: Missouri Department of Natural Resources (MoDNR). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
2-3 hours
Passing Score
70%
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Official sources
Frequently Asked Questions
Is the MO Water 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 MO Water Operator vocabulary game work?
Each round shows a clue for one of 20 MO Water 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 MO Water Operator terms come from?
OpenExamPrep researched each term from the Missouri Department of Natural Resources (MoDNR) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What certification levels does Missouri offer for water operators?
Missouri offers Levels A (highest) through D (lowest) for drinking water treatment and wastewater treatment operators, and DS-I through DS-III for distribution operators.
What score do I need to pass the Missouri operator exam?
A score of 70% or higher is required to pass all Missouri water and wastewater operator certification exams.