Echelon Institute
Canadian Water & Wastewater
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🌊 WPI Exam Prep — BC · AB · SK · MB
Pass Your WPI Water & Wastewater Exam
4,000+ practice questions for WPI Class I–IV Water Treatment and Class I–IV Wastewater — aligned with the Need-to-Know Criteria used by EOCP (BC), AWWOA (AB), SAHO (SK), and MWWA (MB).
4,000+
Practice Questions
8
Exam Levels
4
WPI Provinces
70%
Pass Mark
Select Your Province
WPI exams are administered by your provincial certification body
🏔️ British Columbia
EOCP
Environmental Operators Certification Program
Exam: EOCP Water Treatment Level I–IV
Level ILevel IILevel IIILevel IV
What's on the Exam
Each class level is aligned with the WPI Need-to-Know Criteria. Click any level to see the topic breakdown.
💧 Water Treatment
♻️ Wastewater Treatment
Unlock Full Access
Start with 15 free questions per session — no account required. Upgrade to unlock all questions, timed mock exams, AI Tutor, and score history.
💧 Water Treatment
WPI CLASS I
CA$99
Unlimited · 502 questions
- ✓ Practice questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI CLASS II
CA$149
Unlimited · 598 questions
- ✓ Practice questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
♻️ Wastewater Treatment
WPI CLASS I WW
CA$99
Unlimited · 594 questions
- ✓ Practice questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI CLASS II WW
CA$149
Unlimited · 599 questions
- ✓ Practice questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI vs. OWWCO — Which Exam Do You Need?
Your province determines which certification body you register with. Both systems use standardized national question banks.
| Province | Cert Body | Exam System | Levels Available | Passing Score |
|---|---|---|---|---|
| 🇧🇨 BC | EOCP | WPI | Class I–IV Water & WW | 70% |
| 🇦🇧 AB | AWWOA | WPI | Class I–IV Water & WW | 70% |
| 🇸🇰 SK | SAHO | WPI | Class I–IV Water & WW | 70% |
| 🇲🇧 MB | MWWA | WPI | Class I–IV Water & WW | 70% |
| 🇨🇦 ON | OWWCO | OWWCO | OIT, Class 1–4 Water & WW, WQA | 70% |
Passing score and format may vary — always verify with your provincial certification body before registering.