Chloramine Conversion Support

The drinking water epidemiology program has been providing information and support to the SF Public Utilities Commission (SFPUC) since the conversion to monochloramine for residual disinfection in 2004, to ensure a safe drinking water supply.

SFDPH continues to support the use of chloramine for secondary disinfection in the SFPUC water system. We continue to follow the recommendations of the California Conference of Local Health Officers in our routine activities, including tracking customer complaints , staying apprised of emerging research, communicating with our expert colleagues and following national and international regulatory and legislative developments. We are committed to identifying and evaluating important research or policy developments in a timely manner. Based on our comprehensive and continuing activities, we continue to support the use of chloramine for secondary disinfection in the SFPUC water system.

SFDPH has produced a variety of materials, including fact sheets, presentations and manuscripts, on chloramine which are publicly available in the Document Library. For all peer reviewed literature on Chloramine by SFPDH, visit the Peer Review Publications.

Additional Resouces

Trihalomethanes and Birth Outcomes

The primary objective for the SFPUC switch to monochloramine was to reduce the formation of trihalomethanes (THMs) and haloacetic acids (HAAs). These chemical by-products of disinfection may cause adverse health effects. Chloramine is very effective at limiting the formation of these by-products. Visit the Document Library under the category of Water/Chloramine for additional informational resouces on trihalomethanes.