The Environmental Protection Agency on Tuesday proposed limiting the amount of harmful “forever chemicals” in drinking water to the lowest level that tests can detect, a long-awaited protection the agency said will save thousands of lives and prevent serious illnesses, including cancer.
The plan marks the first time the EPA has proposed regulating a toxic group of compounds that are widespread, dangerous and expensive to remove from water. PFAS, or per- and polyfluorinated substances, don’t degrade in the environment and are linked to a broad range of health issues, including low birthweight babies and kidney cancer. The agency says drinking water is a significant source of PFAS exposure for people.
The proposal would set strict limits of 4 parts per trillion, the lowest level that can be reliably measured, for two common types of PFAS compounds called PFOA and PFOS. In addition, the EPA wants to regulate the combined amount of four other types of PFAS. Water providers will have to monitor for PFAS.
Until now, only a handful of states have issued PFAS regulations, and none has set limits as strict as what the EPA is proposing. By regulating PFOA and PFOS at the minimum amounts that tests can detect, the EPA is proposing the tightest possible standards that are technically feasible, experts said.
The proposal would also regulate other types of PFAS like GenX Chemicals, which manufacturers used as a substitute when PFOA and PFOS were phased out of consumer products. The proposal would regulate the cumulative health threat of those compounds and mandate treatment if that threat is too high.
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