A new report released by the Environmental Working Group reveals that over 218 million people across the United States are being exposed to potentially unsafe concentrations of hexavalent chromium in their drinking water, a chemical compound known to be toxic and carcinogenic in even extremely low concentrations. Nation-wide testing by local water utilities was ordered by the EPA between 2013 and 2016, resulting in over three-quarters of the 62,386 samples taken testing positive for the hexavalent chromium contaminant. An interactive map illustrating EWG's findings can be found here.
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