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On February 2, 2004 our drinking water supplier, San Francisco Public Utilities Commission, changed the domestic water disinfectant from chlorine to chloramine. The main reason for the change is to ensure compliance with stricter federal and state water quality regulations.


Chloramine, similar to chlorine, disinfection has many benefits, including protecting customers from bacteria, viruses and most other microbes that can be found in water. Chloramine is a chemical compound formed by the addition of a small amount of ammonia to the chlorine water mix. The disinfection properties of chloramine last longer than chlorine in the distribution system providing increased protection for the water while it is in the reservoirs and pipelines on its way to your tap. Many consumers from other utilities that have already switched to chloramine report that chloramine improves the taste and odor of drinking water.


While switching to chloramine disinfection is intended to improve public health overall by lowering disinfection byproducts, some customers will need to take precautions. Chloramine is toxic to fish in aquaria and has the potential to be toxic to kidney dialysis patients. The SFPUC has been coordinating with dialysis treatment centers and also addressing the concerns of fish owners to ensure a safe conversion. For more information please see the chloramine conversion - Frequently Asked Questions.


The Stanford Utilities Division started a comprehensive outreach program in the Fall of 2000 targeting the entire campus population. Outreach includes meetings with campus groups, informative articles in campus papers and informational fact sheets on this web site.

Chloramine Conversion Fact Sheet
Stanford Q&A
Chloramine In Detail
Fish, Amphibians, Reptiles
Business and Industry
Dialysis Facilities and Patients

Stanford Service Area
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