EPA Sets New PFAS Standards at Zero

  April 11, 2024
The Environmental Protection Agency (EPA) is issuing this rule after reviewing extensive research and science on how PFAS affects public health while engaging with the water sector and state regulators to ensure effective implementation. EPA also considered more than 120,000 comments on the proposed rule from a wide variety of stakeholders.

More details about the final PFAS drinking water standards.
For PFOA and PFOS, EPA is setting a Maximum Containment Level Goal – a non-enforceable health-based goal – at zero. This reflects the latest science showing that there is no level of exposure to these contaminants without risk of health impacts, including certain cancers.

EPA is setting enforceable Maximum Containment Levels at 4.0 parts per trillion PFOA and PFOS individually. This standard will reduce exposure from these PFAS in our drinking water to the lowest levels that are feasible for effective implementation.

For PFNA, PFHxS and “Gen X Chemicals,” EPA is setting the MCLGs and MCLs at 10 parts per trillion.

Because PFAS can often be found together in mixtures, and research shows these mixtures may have combined health impacts, EPA is also setting a limit for any mixture of two or more of the following: PFAS, PFNA, PFHxS, PFBS and “GenX Chemicals.”

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Read the full EPA Press Release