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 Covered
Questions aligned with the WPI Need-to-Know Criteria for each class level
CLASS I WATER
502 Questions⚗️
Treatment Process
155 questions
Coagulation, flocculation, sedimentation, filtration, disinfection
🔧
Equipment O&M
130 questions
Pumps, valves, meters, chemical feed systems, maintenance
🔬
Laboratory Analysis
80 questions
Turbidity, pH, chlorine residual, bacteriological sampling
🌊
Source Water
75 questions
Surface water, groundwater, watershed protection, intake management
🦺
Safety & Admin
62 questions
WHMIS, confined space, emergency response, record keeping
CLASS II WATER
501 Questions⚗️
Advanced Treatment Processes
150 questions
Ozonation, UV, GAC, membrane filtration, advanced oxidation
🏗️
System Design & Engineering
120 questions
Hydraulics, pipe systems, pump curves, pressure management
🔬
Advanced Lab & Monitoring
95 questions
SCADA, online analyzers, advanced water quality parameters
🌊
Source Water & Environmental
80 questions
Watershed management, climate impacts, source protection plans
📋
Management, Regulations & Safety
56 questions
Drinking Water Quality Standards, emergency planning, staff management
CLASS III WATER
502 Questions🔬
Advanced Process Control
110 questions
Membrane systems, ozone CT, advanced filtration, process optimization
🏗️
Advanced Hydraulics & Design
100 questions
System hydraulics, pump station design, distribution modelling
⚗️
Advanced Water Quality
90 questions
Disinfection by-products, emerging contaminants, regulatory limits
🌊
Source Water Protection
80 questions
Watershed risk assessment, source protection plans, climate resilience
📋
Regulatory Compliance & QMS
75 questions
DWQMS, auditing, corrective action, operator licensing
🦺
Emergency & Safety Management
47 questions
Emergency response planning, incident command, WHMIS advanced
CLASS IV WATER
501 Questions🏭
Advanced Process Control
110 questions
Full plant optimization, advanced CT, membrane integrity, process modelling
💧
Advanced Water Quality
100 questions
DBP formation, taste & odour, emerging contaminants, regulatory compliance
🚨
Emergency Response & Contingency
85 questions
Emergency planning, incident command, business continuity, crisis communications
👔
Plant Management & Leadership
80 questions
Asset management, capital planning, staff development, budget management
📋
Regulatory Compliance & Reporting
75 questions
DWQMS, regulatory reporting, audit management, enforcement response
🌊
Source Water Protection
51 questions
Strategic watershed management, source protection plan implementation
CLASS I WASTEWATER
500 Questions🚰
Wastewater Collection Systems
110 questions
Sewer systems, lift stations, infiltration/inflow, maintenance
⚗️
Primary & Secondary Treatment
130 questions
Screening, grit removal, primary clarifiers, activated sludge, trickling filters
🧪
Solids Handling & Biosolids
90 questions
Thickening, digestion, dewatering, biosolids land application
🔬
Laboratory & Monitoring
85 questions
BOD, TSS, pH, dissolved oxygen, effluent sampling, SCADA
🦺
Safety & Regulations
85 questions
WHMIS, confined space, H2S monitoring, regulatory compliance
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$79
Unlimited · 502 questions
- ✓ 502 practice questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI CLASS II
CA$99
Unlimited · 501 questions
- ✓ 501 advanced questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
♻️ Wastewater Treatment
WPI CLASS I WASTEWATER
CA$79
Unlimited · 500 questions
- ✓ 500 wastewater questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI CLASS II WASTEWATER
CA$99
Unlimited · 501 questions
- ✓ 501 advanced WW questions
- ✓ Timed mock exam
- ✓ Formula sheet
- ✓ AI Tutor
- ✓ Score history
WPI vs. OWWCO — Which Exam Do You Need?
Both WPI and OWWCO use standardized national question banks. Your province determines which certification body you register with.
| Province | Cert Body | Exam System | Levels Available | Question Format | Passing Score |
|---|---|---|---|---|---|
| 🇧🇨 BC | EOCP | WPI | Class I–IV Water & WW | Multiple choice | 70% |
| 🇦🇧 AB | AWWOA | WPI | Class I–IV Water & WW | Multiple choice | 70% |
| 🇸🇰 SK | SAHO | WPI | Class I–IV Water & WW | Multiple choice | 70% |
| 🇲🇧 MB | MWWA | WPI | Class I–IV Water & WW | Multiple choice | 70% |
| 🇨🇦 ON | OWWCO | OWWCO | OIT, Class 1–4 Water & WW, WQA | Multiple choice | 70% |
Passing score and format may vary — always verify with your provincial certification body before registering.