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A National Assessment on Tap Water Quality
Environmental Working Group Tap water in 42 states is contaminated with more than 140 unregulated chemicals that lack safety standards, according to the Environmental Working Group's (EWG's) two-and-a-half year investigation of water suppliers' tests of the treated tap water served to communities across the country. In an analysis of more than 22 million tap water quality tests, most of which were required under the federal Safe Drinking Water Act, EWG found that water suppliers across the U.S. detected 260 contaminants in water served to the public. One hundred forty-one (141) of these detected chemicals -- more than half -- are unregulated; public health officials have not set safety standards for these chemicals, even though millions drink them every day. 
EWG's analysis also found almost 100 percent compliance with enforceable health standards on the part of the nation's water utilities, showing a clear commitment to comply with safety standards once they are developed. The problem, however, is EPA's failure to establish enforceable health standards and monitoring requirements for scores of widespread tap water contaminants. Of the 260 contaminants detected in tap water from 42 states, for only 114 has EPA set enforceable health limits (called Maximum Contaminant Levels, or MCLs), and for 5 others the Agency has set non-enforceable goals called secondary standards. (EPA 2005a). The 141 remaining chemicals without health-based limits contaminate water served to 195,257,000 people in 22,614 communities in 42 states. EWG acquired tap water testing data from state water offices, which collect it from drinking water utilities to fulfill their role as primary enforcement agents. EPA does not maintain a comprehensive, national tap water quality database. Instead, the Agency sets safety standards for contaminants based on partial information, from test data it gathers from select, representative states and water suppliers. EWG will be making its data available to the EPA, state authorities and water utilities. Click Here to read the article |
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