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Hexavalent chromium aka chromium-6 or chrome6. This is the cancer-causing chemical made notorious by the film Erin Brockovich, which documented the poisoning of drinking water in Hinkley, Calif ...
California was the first state to put into effect an MCL for hexavalent chromium (chromium 6) in drinking water in July 2014, setting a limit of 10 ppb. A 2015 United States Geological Survey (USGS) report, based on the EPA's 2010 review of the health effects of chromium 6 in drinking water, re-examined related federal regulations.
The State Water Resources Control Board voted unanimously Wednesday to set the maximum level for chromium-6 in drinking water at 10 parts per billion, a limit that state officials determined will ...
Hexavalent chromium (chromium(VI), Cr(VI), chromium 6) is any chemical compound that contains the element chromium in the +6 oxidation state (thus hexavalent). [1] It has been identified as carcinogenic, which is of concern since approximately 136,000 tonnes (150,000 tons) of hexavalent chromium were produced in 1985. [ 2 ]
The median lethal dose of hexavalent chromium is 50–150 mg/kg. [6] The World Health Organization recommends a maximum allowable concentration of 0.05 milligrams per litre of chromium(VI) in drinking water. [7] In Europe, the use of hexavalent chromium is regulated by the Restriction of Hazardous Substances Directive.
While some bottled water is from a spring or filtration system, research shows that nearly 65% of bottled water sold in the U.S. comes from municipal tap water. But Rumpler says there can be ...
Between 1952 and 1966, PG&E used hexavalent chromium in a cooling tower system to fight corrosion. The waste water was discharged to unlined ponds at the site, and some of the waste water percolated into the groundwater, affecting an area of approximately 2 square miles (5.2 km 2) near the plant. [10]
Only two states—Massachusetts and California—set legally binding maximum contaminant levels on the allowable amount of perchlorate in drinking water, at 2 ppb and 6 ppb respectively. [94] [96] EPA issued an "Interim Health Advisory" for perchlorate in 2009, while it continued to evaluate whether to issue regulatory standards. [95]