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.

Learn step by step how to conduct the test and calculate batch chlorination dose.

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.

  • Format:

    Adobe PDF

  1. Select a language

Need help?

Can’t find what you need? Have more questions about a topic? Need advice on how to use a resource? Chat with a CAWST advisor.

Contact us

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.

USAID logo