1 Disinfection By -products (DBPs) -products (DBPs) , are formed when chlorine and Disinfection by , also called trihalomethanes bromine interact with natural organic materials in water, such as in chlorinated drinking water treated swimming pools. DBPs can be found in the air during activities such as and chlorine- showering, bathing, dishwashing, and swimming. DBPs do not build up in the environment. How People Are Exposed to DBPs People are exposed to DBPs by drinking chlorinated or brominated water and by breathing in air containing DBPs. The skin also absorbs DBPs during bathing and swimming. Afte r exposure, DBPs remain in the body for only a short period of time. People’s Health How DBPs Affect uman health effects from DBPs at low environmental exposures are unknown. Humans The h ly large amounts of some DBPs could experience liver damage and decreased exposed to unusual nervous system activity. Levels of DBPs in the U.S. Population In the Fourth National Report on Human Exposure to Environmental Chemicals ( Fourth Report ), CDC scientists measured four different DBPs in the blood of at least 1,222 participants who took part in the National Health and Nutrition Examination Survey aged 20–59 years s in blood, scientists can estimate the (NHANES) during 2003–2004. By measuring DBP amounts of the DBPs that have entered peoples’ bodies. CDC scienti sts did not find detectable blood levels of DBPs in all participants. Levels were similar to those seen in small past studies. Finding a measurable amount of one or more DBPs in blood does not mean that the level s of DBP cause an adverse health effect. Bi omonitoring studies of blood DBPs can provide physicians and public health officials with reference values so that they can determine whether people have been exposed to higher levels of DBPs than are found in the general population. Biomonitoring data can also help scientists plan and conduct research on exposure and health effects. For More Information Agency for Toxic Substances and Disease Registry Toxicological profile for bromoform and chlorodibromomethane http://www.atsdr.cdc.gov/toxprofiles/tp130.html
2 Toxicological profile for chloroform update http://www.atsdr.cdc.gov/toxprofiles/tp6.html Environmental Protection Agency Disinfection Byproducts: A Reference Resource http://www.epa.gov/enviro/html/icr/gloss_dbp.html November 2009 The Centers for Disease Control and Prevention (CDC) protects people’s health and safety by preventing and controlling diseases and injuries; enhances health decisions by providing credible information on critical health issues; and promotes healthy living through strong partnerships with local, national, and international organizations.
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