LOS ANGELES (WKOW) -- If you're worried about the carcinogen found in Madison's water supply, the U.S. Environmental Protection Agency shares your concern.
The head of the EPA says it will likely tighten drinking water standards.
It comes after a study by the Environmental Working Group found chromium 6 in the tap water of 31 cities, including Madison.
Studies show the chemical can cause cancer.
California Senator Barbara Boxer says she plans to co-sponsor legislation to set a deadline for the EPA to establish an enforceable standard.
The Madison Water Utility says it will begin testing the drinking water in the next few weeks to see how much of the chemical exists and find out where it's coming from.
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