A new study by the Environmental Working Group reports that Ohio drinking water contains hexavalent chromium, a toxic metal that has been linked to cancer. While the U.S.
Environmental Protection Agency does not require the testing for the metal, the survey found that levels in the Ohio water in some areas were pushing the levels proposed as a safety limit by authorities. This contaminant has been proven to cause cancer. You can search your zip code to see the amount in your municipal water supply here: https://www.ewg.org/interactive-maps/2016-chromium6-lower-48.php#.WXYljtPyu-l