Echelon Institute

Canadian Water & Wastewater

📝 OIT Practice

📋 OIT Mock Exam

💧 C1 Water Practice

📋 C1 Water Mock

📐 C1 Water Formulas

💧 C2 Water Practice

📋 C2 Water Mock

📐 C2 Water Formulas

🦠 C1 WW Practice

📋 C1 WW Mock

📐 C1 WW Formulas

♻️ C2 WW Practice

📋 C2 WW Mock

📐 C2 WW Formulas

💧 C3 Water Practice

📋 C3 Water Mock

📐 C3 Water Formulas

💧 C4 Water Practice

📋 C4 Water Mock

📐 C4 Water Formulas

🏭 C3 WW Practice

📋 C3 WW Mock

📐 C3 WW Formulas

🏭 C4 WW Practice

📋 C4 WW Mock

📐 C4 WW Formulas

🧪 WQA Practice

🔬 WQA Mock Exam

📐 WQA Formulas

🌊 WPI — BC / AB / SK / MB

🌊 WPI C1 Water Practice

📋 WPI C1 Water Mock

📐 WPI C1 Water Formulas

🌊 WPI C2 Water Practice

📋 WPI C2 Water Mock

📐 WPI C2 Water Formulas

🌊 WPI C3 Water Practice

📋 WPI C3 Water Mock

📐 WPI C3 Water Formulas

🌊 WPI C4 Water Practice

📋 WPI C4 Water Mock

📐 WPI C4 Water Formulas

🌊 WPI C1 WW Practice

📋 WPI C1 WW Mock

📐 WPI C1 WW Formulas

🌊 WPI C2 WW Practice

📋 WPI C2 WW Mock

📐 WPI C2 WW Formulas

🌊 WPI C3 WW Practice

📋 WPI C3 WW Mock

📐 WPI C3 WW Formulas

🏛️ WPI C4 WW Practice

📋 WPI C4 WW Mock

📐 WPI C4 WW Formulas

🌊 WPI Overview

🏭 Process Guide

♻️ Wastewater

🧮 Math Practice

🗺️ Career Map

🧮 MATH PRACTICE HUB

Master the Calculations.
Pass the Exam.

Every course filtered to calculation questions only — with step-by-step solutions, exam tips, and instant feedback.

800+

Calc Questions

100%

Step-by-Step

18

Courses

💡 Exam Strategy

📐

Formula First

Always write down the formula before plugging in numbers. Examiners award partial marks for correct setup.

🔢

Unit Conversion

Convert all units to SI (L, m³, mg/L, kg/d) before calculating. Most errors come from mixed units.

✅

Sanity Check

After solving, ask: 'Does this answer make physical sense?' A 10,000 mg/L chlorine dose is a red flag.

⏱️

Time Management

On the real exam, skip calc questions you can't solve in 2 minutes and return to them at the end.

Ontario (OIT / ABC)

Class 1–4 Water Treatment

Class 1–4 Wastewater Treatment

ABC Class 1 Water Treatment

Class 1 Wastewater

ABC Class 1 Wastewater Treatment

ABC Class 2 Water Treatment

Class 2 Wastewater

ABC Class 2 Wastewater Treatment

ABC Class 3 Water Treatment

Class 3 Wastewater

ABC Class 3 Wastewater Treatment

ABC Class 4 Water Treatment

Class 4 Wastewater

ABC Class 4 Wastewater Treatment

Water Quality Analyst Exam

WPI — BC / Alberta / Saskatchewan / Manitoba

WPI Class I Water

BC EOCP / AWWOA Class I Water

WPI Class II Water

BC EOCP / AWWOA Class II Water

WPI Class III Water

BC EOCP / AWWOA Class III Water

WPI Class IV Water

BC EOCP / AWWOA Class IV Water

WPI Class I Wastewater

BC EOCP / AWWOA Class I Wastewater

WPI Class II Wastewater

BC EOCP / AWWOA Class II Wastewater

WPI Class III Wastewater

BC EOCP / AWWOA Class III Wastewater

WPI Class IV Wastewater

BC EOCP / AWWOA Class IV Wastewater

🎯 Pro Tip

Struggling with a specific topic?

Use the module filter inside any quiz to focus on one topic at a time — e.g., "Hydraulics" or "Chemical Dosing" — then switch on Math Practice mode for targeted calculation drills.