RESTON, VA — Low levels of certain man-made chemicals remain in some treated drinking water supplies, according to soon-to-be released data from the US Geological Survey (USGS).
According to a USGS media advisory, the USGS conducted studies in Indiana, Texas, Maryland, North Carolina, Georgia, Massachusetts, Oregon, Nevada and Colorado. Water from nine selected rivers, used as sources for public water systems, was analyzed in the USGS study. Scientists tested water samples for commonly used chemicals, including pesticides, solvents, gasoline hydrocarbons, personal care products, disinfection byproducts and manufacturing additives.
Scientists found that low levels of certain man-made chemicals remain in public water supplies after the water has been treated in selected communies.
Most of the man-made chemicals assessed are not required to be monitored, regulated or removed from water treatment facilities, the USGS stated.
Findings and implications for treated and untreated water in different areas of the country are scheduled to be presented by the USGS on December 5 in Washington, DC, in cooperation with the Environmental and Energy Study Institute and the Water Environment Federation, the media advisory said.
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