Minnesota Water/Wastewater Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the Minnesota Water/Wastewater Operator Vocabulary Game
A free word game for the Minnesota Water/Wastewater Operator exam. Each round shows a clue for one of 20 exam terms across 14 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 Minnesota Water/Wastewater Operator Vocabulary Game
Certification regulators
Federal rules
Wastewater rules
Disinfection
Drinking water treatment
Preliminary treatment
Secondary treatment
Primary treatment
Solids handling
Collection systems
Onsite systems
Equipment operation
Laboratory analysis
Workplace hazards
Sources for these terms (22)
- Water Operator Certification and Training (Minnesota Department of Health) · Source checked 2026-11-04
- Drinking Water Operator Certification Frequently Asked Questions (Minnesota Department of Health) · Source checked 2026-11-04
- Wastewater training and certification (Minnesota Pollution Control Agency) · Source checked 2026-11-04
- Septic systems (Minnesota Pollution Control Agency) · Source checked 2026-11-04
- SSTS financial assistance (Minnesota Pollution Control Agency) · Source checked 2026-11-04
- Safe Drinking Water Act (SDWA) · 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
- Stage 1 and Stage 2 Disinfectants and Disinfection Byproducts Rules · Source checked 2026-11-04
- Overview of Drinking Water Treatment Technologies · Source checked 2026-11-04
- Preliminary Wastewater Treatment (NPDES Operator Webinar, July 25, 2023) · 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
- Wastewater Technology Fact Sheet: Package Plants (EPA 832-F-00-016, September 2000) · Source checked 2026-11-04
- What is a Wastewater Lagoon? (EPA 832-F-25-009, July 2025) · Source checked 2026-11-04
- Basic Information about Sewage Sludge and Biosolids · Source checked 2026-11-04
- Industrial Uses for Fats, Oils, and Grease · Source checked 2026-11-04
- EPA Needs to Determine What Barriers Prevent Water Systems from Securing Known SCADA Vulnerabilities (EPA OIG Report 2005-P-00002, January 6, 2005) · 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
- 1910.132 - General requirements (Personal Protective Equipment) · Source checked 2026-11-04
- Need to Know for Wastewater Treatment Facility and Collection System Operators (MPCA wq-wwtp12-06) · Source checked 2026-11-04
About the MN Water Operator Exam
Minnesota splits water operator certification between MDH (drinking water, Classes A-E) and MPCA (wastewater, Classes A-D plus Type S collection systems). Each exam has 100 closed-book multiple-choice questions with a 3-hour limit. Wastewater facilities are classified by a rated point system; drinking water levels are based on education, experience, and system type.
Exam sponsor: Minnesota Pollution Control Agency (MPCA) / Minnesota Department of Health (MDH). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
3 hours
Passing Score
70%
Exam / Certification Fees
MPCA wastewater: $55 exam + $45 certification; MDH drinking water: $32 exam + $23 certification
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the MN 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 MN Water Operator vocabulary game work?
Each round shows a clue for one of 20 MN 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 MN Water Operator terms come from?
OpenExamPrep researched each term from the Minnesota Pollution Control Agency (MPCA) / Minnesota Department of Health (MDH) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
Who administers water operator certification in Minnesota?
Water and/or wastewater operator certification in Minnesota is administered by Minnesota Pollution Control Agency (MPCA) / Minnesota Department of Health (MDH). Drinking water: Class A-E (MDH); Wastewater: Class A-D and S-A through S-D (MPCA). Collection systems classified separately..
What score do I need to pass the Minnesota water operator exam?
Minnesota requires a passing score of 70% on the operator certification exam. The exam typically consists of 100 multiple-choice questions with a time limit of 3 hours.