# CWS - Certified Water Specialist — Practice Test Geeks
# https://practicetestgeeks.com/llms/cws-certified-water-specialist.txt
# Updated: 2026-06-03

> Free CWS - Certified Water Specialist practice tests and study guides. Free CWS (Certified Water Specialist) practice test with questions and answer explanations. Prepare for the 2026 May exam with instant scoring. Language: English. Region: US.

## Overview

- **Category**: CWS - Certified Water Specialist
- **Main page**: https://practicetestgeeks.com/certified-water-specialist-test
- **Language**: English | **Region**: US
- **Practice tests**: 25 tests, 183 questions total
- **Exam simulation**: Full-length 100-question timed exam (120 min, 70% pass mark)
- **Study guides / articles**: 1 published

## Exam Simulations (Full-Length, Timed, Scored)

Simulates real exam conditions: question count, time limit, passing score, domain weighting.

- [Certified Water Specialist (CWS) Exam](https://practicetestgeeks.com/cws/exam) — 100 questions, 120 min, 70% pass
  The CWS certification validates a professional's expertise in water treatment technologies, water quality issues, and the application of solutions for

## Practice Tests (25 available)

- [CWS Water Treatment Equipment & Technologies 1](https://practicetestgeeks.com/free-cws-water-treatment-equipment-technologies-questions-and-answers) (9 questions)
- [CWS Water Chemistry & Contaminant Identification 1](https://practicetestgeeks.com/free-cws-water-chemistry-contaminant-identification-questions-and-answers) (9 questions)
- [CWS Regulations, Safety & Professional Ethics 1](https://practicetestgeeks.com/free-cws-regulations-safety-professional-ethics-questions-and-answers) (9 questions)
- [CWS Installation, Maintenance & Troubleshooting 1](https://practicetestgeeks.com/free-cws-installation-maintenance-troubleshooting-questions-and-answers) (9 questions)
- [CWS Ultraviolet Disinfection Systems 4](https://practicetestgeeks.com/cws/questions/ultraviolet-disinfection-systems-4) (7 questions)
- [CWS Water Chemistry & Contaminant Identification 2](https://practicetestgeeks.com/cws/questions/water-chemistry-contaminant-identification-2) (7 questions)
- [CWS Iron, Manganese & Hydrogen Sulfide Removal 1](https://practicetestgeeks.com/cws/questions/iron-manganese-hydrogen-sulfide-removal) (7 questions)
- [CWS Regulations, Safety & Professional Ethics 3](https://practicetestgeeks.com/cws/questions/regulations-safety-professional-ethics-3) (7 questions)
- [CWS Ultraviolet Disinfection Systems 3](https://practicetestgeeks.com/cws/questions/ultraviolet-disinfection-systems-3) (7 questions)
- [CWS Filtration Media & Technologies 2](https://practicetestgeeks.com/cws/questions/filtration-media-technologies-2) (7 questions)
- [CWS Filtration Media & Technologies 3](https://practicetestgeeks.com/cws/questions/filtration-media-technologies-3) (7 questions)
- [CWS Filtration Media & Technologies 4](https://practicetestgeeks.com/cws/questions/filtration-media-technologies-4) (7 questions)
- [CWS Installation, Maintenance & Troubleshooting 2](https://practicetestgeeks.com/cws/questions/installation-maintenance-troubleshooting-2) (7 questions)
- [CWS Installation, Maintenance & Troubleshooting 3](https://practicetestgeeks.com/cws/questions/installation-maintenance-troubleshooting-3) (7 questions)
- [CWS Water Softening & Ion Exchange 2](https://practicetestgeeks.com/cws/questions/water-softening-ion-exchange-2) (7 questions)
- [CWS Regulations, Safety & Professional Ethics 2](https://practicetestgeeks.com/cws/questions/regulations-safety-professional-ethics-2) (7 questions)
- [CWS Reverse Osmosis Systems 3](https://practicetestgeeks.com/cws/questions/reverse-osmosis-systems-3) (7 questions)
- [CWS Water Softening & Ion Exchange 3](https://practicetestgeeks.com/cws/questions/water-softening-ion-exchange-3) (7 questions)
- [CWS Water Softening & Ion Exchange 4](https://practicetestgeeks.com/cws/questions/water-softening-ion-exchange-4) (7 questions)
- [CWS Customer Needs Assessment & Sales 4](https://practicetestgeeks.com/cws/questions/customer-needs-assessment-sales-4) (7 questions)
- [CWS Customer Needs Assessment & Sales 2](https://practicetestgeeks.com/cws/questions/customer-needs-assessment-sales-2) (7 questions)
- [CWS Customer Needs Assessment & Sales 3](https://practicetestgeeks.com/cws/questions/customer-needs-assessment-sales-3) (7 questions)
- [CWS Customer Needs Assessment & Sales 5](https://practicetestgeeks.com/cws/questions/customer-needs-assessment-sales-5) (7 questions)
- [CWS Residential Water Quality Testing 2](https://practicetestgeeks.com/cws/questions/residential-water-quality-testing-2) (7 questions)
- [CWS Reverse Osmosis Systems 2](https://practicetestgeeks.com/cws/questions/reverse-osmosis-systems-2) (7 questions)

## Articles & Study Guides

- [CWS (Certified Water Specialist) Test: Your Guide](https://practicetestgeeks.com/certified-water-specialist-test)

## About Practice Test Geeks

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