STEVE INSKEEP, Host: And independent laboratory released a study last month that found chromium-6 in the tap water of more than two dozen American cities. And yesterday the EPA urged cities to check their water supplies for the metal twice per year. As we've reported, scientists do not agree on how much chromium-6 a person would have to consume to put his or her health at risk.
The U.S. Environmental Protection Agency is urging cities across the country to test their drinking water for chromium-6. Also known as hexavalent chromium, it's a metal that scientists say can cause cancer.