Explore Chlorine Disinfection

Collection

Jul 25, 2024

Learn About Drinking Water Quality Testing

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.

Languages

Arabic

English

Spanish

French

Collection

Jul 25, 2024

Learn About Chlorine

Learn About Chlorine

Languages

Arabic

English

Spanish

French

Haitian Creole

Swahili

Collection

Jul 12, 2024

Learn About Drinking Water Treatment for Emergency Contexts

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

Languages

Arabic

English

Spanish

French

Hindi

Document

Jul 14, 2022

Chlorine Dose Calculator: Batch Chlorination of Drinking Water

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.

Languages

Arabic

English

Spanish

French

Document

Jul 14, 2022

Chlorine Dose Calculator: Shock Chlorination of Wells

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.

Languages

Arabic

English

Spanish

French

Document

Jul 14, 2022

Chlorine Dose Calculator: Shock Chlorination of Tanks

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.

Languages

Arabic

English

Spanish

French

E-Learning

Dec 1, 2021

Check Before you Disinfect: Batch Chlorination Scenario

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.

Languages

Arabic

English

Spanish

French

E-Learning

Nov 30, 2021

Using the Modified Horrocks' Test to Calculate effective Chlorine Dosage

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.

Languages

Arabic

English

Spanish

French

Document

Oct 19, 2021

Calculate your Chlorine Dose: Modified Horrocks' Test Instructions

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.

Languages

Arabic

English

Spanish

French

Document

Oct 19, 2021

Store Chlorine Products Safely!

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.

Languages

Arabic

English

Spanish

French

Document

Oct 19, 2021

Handle Chlorine Products Safely!

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.

Languages

Arabic

English

Spanish

French

Document

Sep 29, 2021

Check Before you Disinfect: Turbidity, pH, and Temperature in Drinking Water 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.

Languages

Arabic

English

Spanish

French

Document

Sep 29, 2021

How to Make a 1% Chlorine Solution

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.

Languages

Arabic

English

Spanish

French

About CAWST

CAWST is a Canadian charity and licensed engineering firm. We address the global need for safe drinking water and sanitation by building local knowledge and skills on household solutions people can implement themselves.

Supported by

Development of this website and creation of collections of emergency themed tools on Water Treatment, Water Quality Testing, Behavior Change and Sanitation funded by Bureau of Humanitarian Assistance - USAID.

This project is made possible by the generous support of the American people through the United States Agency for International Development (USAID). The contents are the responsibility of CAWST (Centre for Affordable Water and Sanitation Technology) and do not necessarily reflect the views of USAID or the United States Government.

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