Report: Harmful chemicals found in tap water of 31 U.S. cities

Millions of Americans in at least 31 U.S. cities could be drinking tap water contaminated with the harmful chemical hexavalent chromium, according to a report released Monday by the non-profit Environmental Working Group.

While the dangerous carcinogen, otherwise known as chromium-6, may sound foreign to most people, perhaps the name Erin Brockovich will ring a bell.

After chromium-6 was discovered in the water supply of Hinkley, California, Brockovich helped bring about a lawsuit that ultimately ended in 1996 with the utility company, Pacific Gas & Electric, paying more than $330 million in damages.  Norman, Oklahoma; Honolulu, Hawaii; and Riverside, California, top the non-profit organization’s list of cities with water supplies contaminated by chromium-6.

Although the Environmental Protection Agency does not require water utilities to test for chromium-6, and has not established a legal threshold for how much can be in our water, the agency has classified the toxin as “likely to be carcinogenic to humans.”

“I was expecting to find hexavalent chromium in some of the cities we checked, but I didn’t expect it to be so widespread,” said Rebecca Sutton, a senior scientist with the Environmental Working Group and the lead author of the study.

Sutton said there is a well-documented corollary between exposure to chromium-6 and a greater risk of stomach cancer in humans. Additionally, there is ample animal evidence showing a broad risk of gastrointestinal tumors in rats and mice exposed to the toxin, she said.

Worse, skipping tap water in favor of bottled water does not guarantee you’ll be protected.

“Bottled water is not necessarily any safer than tap water,” said Sutton. “We just don’t have any guarantee that hexavalent chromium isn’t in that water.”

So how can you protect yourself? Sutton says your best bet is buying an effective water filter.

“Getting the water filter is a great way to protect yourself and your family,” says Sutton. “It’s a step you can take yourself; you don’t have to wait for government action.”

Samples from the test provided a “one-time snapshot” of water systems that serve 26 million people, the Environmental Working Group said. But the organization said the results show that more federal regulation of the cancer-causing chemical is needed.

The National Toxicology Program has said that chromium-6 in drinking water shows “clear evidence of carcinogenic activity.”

California’s state environmental agency has proposed capping levels of the chemical in drinking water at 0.06 parts per billion. The Environmental Working Group said 25 of the cities it tested showed exceeded that level.

To conduct its test, the organization said it recruited volunteers in 35 cities to collect tap water samples “from unfiltered taps in homes or in public buildings such as hospitals, libraries and malls,” the report said.

Here are the cities

1. Norman, Oklahoma
2. Honolulu, Hawaii
3. Riverside, California
4. Madison, Wisconsin
5. San Jose, California
6. Tallahassee, Florida
7. Omaha, Nebraska
8. Albuquerque, New Mexico
9. Pittsburgh, Pennsylvania
10. Bend, Oregon
11. Salt Lake City, Utah
12. Ann Arbor, Michigan
13. Atlanta, Georgia
14. Los Angeles, California
15. Bethesda, Maryland
16. Phoenix, Arizona
17. Washington, D.C.
18. Chicago, Illinois
19. Milwaukee, Wisconsin
20. Villanova, Pennsylvania
21. Sacramento, California
22. Louisville, Kentucky
23. Syracuse, New York
24. New Haven, Connecticut
25. Buffalo, New York
26. Las Vegas, Nevada
27. New York, New York
28. Scottsdale, Arizona
29. Miami, Florida
30. Boston, Massachusetts
31. Cincinnati, Ohio

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