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By Bridget Huber, FairWarning tapwater

Chemicals used to treat drinking water for millions of Americans may raise the risk of cancer and lead to other unintended health hazards, according to a report released today by the Environmental Working Group, an advocacy organization.

The group is urging the U.S. Environmental Protection Agency to reevaluate its standards for the byproducts created when water is disinfected. The Environmental Working Group also is pushing officials to clean up sources of public drinking water to reduce the need for chemical treatment in the first place.