U.S. Bolsters Chemical Restrictions for Water

The Environmental Protection Agency announced on Monday that it would overhaul drinking water regulations so that officials could police dozens of contaminants simultaneously and tighten rules on the chemicals used by industries.

The new policies, which are still being drawn up, will probably force some local water systems to use more effective cleaning technologies, but may raise water rates.

“There are a range of chemicals that have become more prevalent in our products, our water and our bodies in the last 50 years,” the E.P.A. administrator, Lisa P. Jackson, said in a speech on Monday. Regulations have not kept pace with scientific discoveries, and so the agency is issuing “a new vision for providing clean, safe drinking water.”

Along with its other steps, Ms. Jackson said the E.P.A. was readying stricter regulations on four carcinogens often detected in drinking water, including a chemical commonly used in dry cleaning.

The announcements come amid growing complaints that systems across the nation are delivering tap water that poses health risks to residents. Government and other scientists have identified hundreds of chemicals that are linked to diseases in small concentrations and that are unregulated in drinking water, or policed at limits that still pose serious risks.

In some instances, laws are sufficient, but they have been ignored: More than 20 percent of the nation’s water treatment systems have violated key provisions of the Safe Drinking Water Act over the last five years, according to an analysis of federal data by The New York Times. And the other major water law — the Clean Water Act — has been violated more than half a million times, though few polluters were ever punished.

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