Washington Water/Wastewater Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the Washington Water/Wastewater Operator Vocabulary Games
4 free word games built on 20 Washington Water/Wastewater Operator terms across 7 topics. Every game deals terms at random and shows what each term means, so you can keep playing as long as you like.
How to Play
- 1.Read the clue and type the term (3 to 6 letters).
- 2.Green: right spot. Yellow: wrong spot. Gray: not in the term.
- 3.Solve it in 6 tries, then read the explanation.
- 1.Swap two neighboring tiles to line up 3 of the same term.
- 2.Longer lines, two lines at once and chains score more.
- 3.Play until no swap can make a line.
- 1.Flip two cards. A matching pair stays face up.
- 2.Each pair you find shows what the term means.
- 3.Clear the board in as few moves as you can.
- 1.Find each listed term in the letter grid.
- 2.Drag across its letters: across, down or diagonally.
- 3.Find all five as fast as you can.
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Topics in the Washington Water/Wastewater Operator Vocabulary Game
Laboratory analysis
Workplace hazards
Water treatment
Wastewater process
Collection systems
Certification rules
Solids handling
Sources for these terms (20)
- 5.2 Dissolved Oxygen and Biochemical Oxygen Demand (Monitoring & Assessment, EPA archive) · Source checked 2026-11-06
- Industrial Uses for Fats, Oils, and Grease · Source checked 2026-11-06
- What is a Wastewater Lagoon? (EPA 832-F-25-009, July 2025) · Source checked 2026-11-06
- National Primary Drinking Water Regulations · Source checked 2026-11-06
- Municipal Nutrient Removal Technologies Reference Document (EPA 832-R-08-006, September 2008) · Source checked 2026-11-06
- Optimize Your Wastewater Plant Operations; Save Energy - Save Money; Reduce Nutrient Discharge (EPA webinar, October 21, 2021) · Source checked 2026-11-06
- Wastewater Technology Fact Sheet: Package Plants (EPA 832-F-00-016, September 2000) · Source checked 2026-11-06
- Preliminary Wastewater Treatment (NPDES Operator Webinar, July 25, 2023) · Source checked 2026-11-06
- Sanitary Sewer Overflows (SSOs) · Source checked 2026-11-06
- Overview of Drinking Water Treatment Technologies · Source checked 2026-11-06
- 5.5 Turbidity (Monitoring & Assessment, EPA archive) · Source checked 2026-11-06
- 1910.132 - General requirements (Personal Protective Equipment) · Source checked 2026-11-06
- 1910.134 - Respiratory protection · Source checked 2026-11-06
- Hazard Communication Standard: Safety Data Sheets (OSHA 3514) · Source checked 2026-11-06
- 40 CFR 141.2 - Definitions (National Primary Drinking Water Regulations) · Source checked 2026-11-06
- Certification information (Wastewater operator certification) · Source checked 2026-11-06
- Waterworks Operator Certification · Source checked 2026-11-06
- Combined Sewer Overflows (CSOs) · Source checked 2026-11-06
- WAC 173-230-260 Education and experience requirements for Groups I through IV OIT certifications · Source checked 2026-11-06
- WAC 246-292-033 Duties of a CCS · Source checked 2026-11-06
About the WA Water/Wastewater Operator Exam
Washington splits water operator certification between two agencies: Department of Health (waterworks Group 1–4) and Department of Ecology (wastewater OIT through Group IV). The passing score is 70% and applicants have one year to pass after approval.
Exam sponsor: Washington DOH (waterworks) / Department of Ecology (wastewater). 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 (waterworks: 2 hours for WDS, 3 hours for CCS, WDM and WTPO exams)
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 WA 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 do the WA Water Operator vocabulary games work?
There are 4 games built on 20 WA Water Operator terms. In Guess the Term, a clue describes one term and you have six tries to spell it, with green, yellow and gray letters showing how close you are. In Term Match, six terms appear as colored tiles; swap neighbors to line up three or more of the same term, and each match shows what the term means. In Term Pairs, twelve face-down cards hide six pairs of terms; flip two at a time to find each pair, and every pair you find shows what the term means. In Term Search, five terms hide in a grid of letters, reading across, down or diagonally; drag across a term to circle it, and each term you find shows what it means.
Where do the WA Water Operator terms come from?
OpenExamPrep researched each term from the Washington DOH (waterworks) / Department of Ecology (wastewater) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
Which agencies certify operators in Washington?
Department of Health certifies waterworks operators; Department of Ecology certifies wastewater operators.
What is the OIT certification?
Operator-in-Training requires 3 months of experience (or 3 college credits/CEUs) and is Washington's entry-level wastewater certification.