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Spurred by a groundbreaking 2010 EWG investigation that found chromium-6 in the tap water of 31 cities and a Senate hearing prompted by the findings, the EPA ordered local water utilities to begin the first nationwide tests for the unregulated contaminant. From 2013 to 2015, utilities took more than 60,000 samples of drinking water and found chromium-6 in more than 75 percent of them. EWG's analysis of the test data estimates that water supplies serving 218 million Americans – more than two-thirds of the population – contain more chromium-6 than the California scientists deemed safe.
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.
Sam Delson, with California’s Office of Environmental Health Hazard Assessment, said that at 0.02 ppb, “if a million people were to drink water with this level of chromium-6 for a lifetime of 70 years, we would theoretically expect one additional case of cancer,” Delson says. The cancer risk at 10 ppb “would be 500 in one million.”
Perry Cohn, a retired environmental epidemiologist with the New Jersey Department of Health, who was involved in setting the state’s standard, said the Environmental Working Group’s conclusions were extremely concerning.
“This is quite shocking, to be honest,” said Brockovich of the level of contamination detailed in the report. She has dealt with issues involving chromium-6 for 25 years, ever since her involvement in the Hinkley case, and said that she knew “it was always lurking around,” and not specific to just that town. But she didn’t know it was this widespread. As a known carcinogen, chromium-6 will lead to avoidable cases of cancers when present at levels above those set by New Jersey and California, she added.
3.1.2 Examples of Naturally Occurring Cr(VI) in Groundwater
Naturally occurring Cr(VI) in groundwater has been identified in the fol-
lowing geologic environments to date:
• Arid alluvial basins in the Southwest U.S.
• Chromite ore bodies
• Saline brines in evaporate basins
• Serpentinite ultramafic terrains
originally posted by: Phage
a reply to: ghostrager
The quote is the gist of it.
Point being, spring water is not immune to chromium VI.