Environmental Working Group

The Environmental Working Group (EWG) is an American environmental organization that specializes in research and advocacy in the areas of toxic chemicals, agricultural subsidies, public lands, and corporate accountability. EWG is a non-profit organization whose mission, according to its website, is "to use the power of public information to protect public health and the environment."

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    • EWG's Tap Water US | 2015
      January 2017
      Source: Environmental Working Group
      Uploaded by: Knoema
      Accessed On: 01 August, 2017
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      EWG’s National Tap Water Quality Database includes information about drinking water quality for nearly 50,000 water companies or utilities nationwide. The database displays information about the chemical and radioactive contaminants detected in drinking water, and how these concentrations compare to the federal legal limits and to health guidelines. It also includes violations of drinking water regulations by water utilities across the country. EWG's database includes water quality tests conducted by utilities nationwide from 2010 to 2015. To build this database, EWG requested the water quality data for community water systems from authorities responsible for drinking water quality oversight in all 50 states and Washington, D.C. State drinking water authorities, typically health or environmental departments, maintain the records on water testing from drinking water utilities or associated water testing laboratories. Altogether, EWG's drinking water quality database includes nearly 30 million test results for 502 contaminants, making it the largest resource of free and openly accessible data on U.S. drinking water.