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Endocrine disrupting chemicals in the environment
New information is continually emerging about the natural and synthetic chemicals people and industries use every day and dispose of down their drains and toilets. Some chemicals of concern are classified as endocrine disrupting compounds, or EDCs. BackgroundEDCs are natural or synthetic chemicals that interfere with or mimic the hormones responsible for growth and development of an organism. Some EDCs are synthetic hormones (such as ethynylestradiol, found in birth control pills) and natural hormones (such as estrogen and testosterone). Some EDCs are found in commonly used products such as personal-care products like soaps and cosmetics (some contain nonylphenol compounds and parabens), industrial byproducts, plastics (phthalates) and pesticides. When these products are used, disposed of, or excreted by people or animals, they typically end up in either stormwater or wastewater. While wastewater treatment processes can remove a significant amount of these compounds, small concentrations of some are discharged into surface waters. Nationally and internationally, scientists are studying the potential effects of EDCs on aquatic life and wildlife. Several chemicals have been classified as EDCs, but many compounds have not yet been tested. Because this impact of EDCs is an issue of national and international scope, it is beyond the capability of a local agency or utility to solve alone. Studies will continue for many years before definitive answers are known and regulations adopted. King County understands public interest and concerns about this issue, so as we learn more, we will respond to recommendations and amend regulations as needed. What King County is doingBelow is a summary of what we know and what we are doing now to deal with the issue of EDCs:
For more information
Contact Jo Sullivan, community relations planner for the Wastewater Treatment Division, at 206-296-8361.
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Department of Natural Resources and Parks Updated: June 17, 2008
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King County | Natural Resources & Parks | Wastewater Treatment Division Links to external sites do not constitute endorsements by King County. |