The EWG States that there are Potentially unsafe concentrations of chromium 6 for two-thirds of Americans.
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UPDATE: With the release of EWG’s Tap Water Database, we found an additional 32 million Americans who have been supplied water with chromium-6 contamination.
In the film “Erin Brockovich,” the environmental crusader confronts the lawyer of a power company that polluted the tap water of Hinkley, Calif., with a carcinogenic chemical called chromium-6. When the lawyer picks up a glass of water, Brockovich says: “We had that water brought in ‘specially for you folks. Came from a well in Hinkley.”
The lawyer sets down the glass and says, “I think this meeting’s over.”
But almost 25 years after that real-life confrontation, the conflict over chromium-6 is not over. A new EWG analysis of federal data from nationwide drinking water tests shows that the compound contaminates water supplies for more than 200 million Americans in all 50 states. Yet federal regulations are stalled by a chemical industry challenge that could mean no national regulation of a chemical state scientists in California and elsewhere say causes cancer when ingested at even extraordinarily low levels.
The standoff is the latest round in a tug-of-war between scientists and advocates who want regulations based strictly on the chemical’s health hazards and industry, political and economic interests who want more relaxed rules based on the cost and feasibility of cleanup. If the industry challenge prevails, it will also extend the Environmental Protection Agency’s record, since the 1996 landmark amendments to the Safe Drinking Water Act, of failing to use its authority to set a national tap water safety standard for any previously unregulated chemical.
In 2008, a two-year study by the National Toxicology Program found that drinking water with chromium-6, or hexavalent chromium, caused cancer in laboratory rats and mice. Based on this and other animal studies, in 2010, scientists at the respected and influential California Office of Environmental Health Hazard Assessment concluded that ingestion of tiny amounts of chromium-6 can cause cancer in people, a conclusion affirmed by state scientists in New Jersey and North Carolina.
The California scientists set a so-called public health goal of 0.02 parts per billion in tap water, the level that would pose negligible risk over a lifetime of consumption. (A part per billion is about a drop of water in an Olympic-size swimming pool.) But in 2014, after aggressive lobbying by industry and water utilities, state regulators adopted a legal limit 500 times the public health goal. It is the only enforceable drinking water standard at either the state or federal level.