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Probable Carcinogen Hexavalent Chromium Found In Drinking Water In 31 Cities

12/19/2010 03:00 pm ET | Updated May 25, 2011

An environmental group that analyzed the drinking water in 35 cities across the United States, including Bethesda and Washington, found that most contained hexavalent chromium, a probable carcinogen that was made famous by the film "Erin Brockovich."

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