Out of 35 cities tested in a study by the Environmental Working Group, 31 of them had hexavalent chromium in their tap water. The cities that had the most hexavalent chromium in their tap water included Norman, Oklahoma; Honolulu, Hawaii; and Riverside, California. Unfortunately, there are no national standards yet to limit the amount of hexavalent chromium in tap water. It gets into water as a result of industrial contamination and occurs naturally in certain minerals. Chlorine can also turn trivalent chromium into hexavalent chromium.
Yes it is, the contaminant that Erin Brockovich fought to get out of the groundwater of the town of Hinkley, California is actually pretty rapid throughout American water. A survey on 35 US cities showed that 31 of them had traces of Chromium-6 in their waters. Norman, Oklahoma; Honolulu, Hawaii; and Riverside, California returned the highest levels of contamination. Read more from the citation below.
Hexavalent Chromium (commonly known as chromium-6) has been a widely used industrial chemical for decades and has evidently leached into the groundwater in many areas. It is a cancer-causing agent that has been found in the tap water of many U.S. cities. The Environmental Working Group (EWG) tested tap water from 35 U.S. cities and concluded that 31 of these cities had chromium-6 in their tap water. The EWG report states:
“Despite mounting evidence of the contaminant’s toxic effects, the U.S. Environmental Protection Agency (EPA) has not set a legal limit for chromium-6 in tap water and does not require water facilities to test for it. Hexavalent chromium is commonly discharged from steel and pulp mills as well as metal-plating and leather-tanning facilities. It can also pollute water through erosion of natural deposits.”
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