Explore Chlorination

Turbidity, pH, and temperature can all impact how fast and how well chlorine products can disinfect drinking water. Use this guide to determine how these parameters will affect your chlorine dosage and contact time.

This guide provides instructions for conducting the Modified Horrocks Test. This test is used to determine the effective chlorine dose for batch chlorination of drinking water.

Follow this guide to prepare a 1% chlorine solution that can be used for the Modified Horrock's Test and disinfection of the water supply.

A collection of short e-learning tools and job aids to help humanitarian and development workers test the quality of drinking water under field conditions.

Use the materials in this collection when facilitating and in-person Chlorination for Safe Drinking Water Workshop.

Follow the guidelines in this poster to handle and use chlorine products safely. This poster is ideal for printing and placing in any location where chlorine products are handled and stored.

A collection of practical WASH resources to support Ebola outbreak preparedness and response.

A collection of short e-learning tools and job aids to help water technicians treat, disinfect and safely handle drinking water under field conditions.

Follow the guidelines in this poster to store and transport chlorine products safely. This poster is ideal for printing and placing in any location where chlorine products are handled and stored.

This participant workbook is an essential tool for the Chlorination for Safe Drinking water in-person workshop. It is meant to be printed for each participant to use during and after the course.

This Trainer Manual is for people who organize and facilitate workshops on Safe Chlorination for Drinking Water.

This simple poster set outlines when to use shock chlorination.

The chlorination card game helps people understand how chlorine works as a disinfection option for drinking water in a variety of conditions. This resource includes the cards only.

This fact sheet describes disinfection of drinking water using a Venturi inline chlorinator.

Use this calculator to determine the amount of chlorine product needed to prepare a 1% chlorine solution and the amount of the 1% solution required to to disinfect hand-dug wells and boreholes.

This fact sheet describes disinfection of drinking water using a T-Chlorinator.

Water temperature affects the rate of the chemical reactions involved in chlorination. Use this guide to determine how to measure temperature and how this will affect your chlorine disinfection contact time.

Use this calculator to determine the amount of chlorine to prepare a 1% chlorine solution and the amount of the 1% solution required to disinfect a batch of drinking water.

This fact sheet describes disinfection of drinking water using a Slow Release Tank Chlorinator.

Turbidity, pH, and temperature can all impact how fast and how well chlorine products can disinfect drinking water. Challenge yourself as you manage a water delivery at a humanitarian camp; select and evaluate the required water parameter tests and learn how these parameters can affect chlorine dosage and contact time.

Use this calculator to determine the chlorine needed for disinfecting wells, drinking water, and storage tanks. Read instructions before use.

Step-by-step instructions for using a turbidity tube to measure how cloudy water is and determine if pre-treatment may be needed before disinfection.

Use this colourful card activity to help participants understand how different water-related diseases are connected through similar transmission routes and prevention strategies. This resource includes the cards and instructions. Print the cards double sided, flip on the long edge.

A fact sheet debunking common fears about chlorinated drinking water, backed by WHO guidance — for WASH trainers, educators, and community promoters.

Use this Excel calculator to determine the amount of chlorine required to disinfect storage tanks and tankers through shock chlorination. This method is recommended for new tanks or when there is evidence of microbial contamination.

The Modified Horrocks' Test is a method of calculating the correct chlorine dosage for a known quantity of water. Follow along with Peter Thomson, senior director at CAWST as he conducts the Horrcks' test to calculate the correct chlorine dosage for a batch of drinking water.

The chlorination card game helps people understand how chlorine works as a disinfection option for drinking water in a variety of conditions. This resource includes the cards and the instructions for facilitating the activity.

Use these activities and games to facilitate group understanding of water, sanitation, and hygiene.

This collection contains the resources for both trainers and participants for the Introduction to Drinking Water Quality Testing (DWQT) workshop.

Learn About Chlorine