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Fact Sheet 2004–3032

Studies on Disinfection By-Products and Drinking Water

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Drinking water is disinfected with chemicals to remove pathogens, such as Giardia and Cryptosproridium, and prevent waterborne diseases such as cholera and typhoid. During disinfection, by-products are formed at trace concentrations. Because some of these by-products are suspected carcinogens, drinking water utilities must maintain the effectiveness of the disinfection process while minimizing the formation of by-products.

For additional information contact:
Chief Scientist, Hydrology
Branch of Hydrologic Research
U.S. Geological Survey
409 National Center
12201 Sunrise Valley Drive
Reston, VA 20192
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