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New EPA PFAS drinking water rule


New EPA PFAS drinking water rule is released on April 10, 2024.

The U.S. EPA published its National Primary Drinking Water Regulation for six PFAS chemicals – perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), PFNA, PFHxS, PFBS, and HFPO-DA (GenX Chemicals). This final ruling includes Maximum Contaminant Levels (MCLs), which are legally enforceable limits, and MCL Goals, which are non-enforceable public health goals.

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The final rule is expected to take effect in three years – in 2027 – and requires public water systems to monitor and notify the public of the levels of these PFAS in water supplies. The rule also allows public water systems five years to reduce PFAS exposure if they exceed these MCLs and implement solutions by 2029.

The agency also released guidance on certified filter, citing WQA certification listings and filtration technology as an effective way to reduce PFAS.

“These new regulations underscore the importance of proactive measures in providing access to high-quality drinking water,” said WQA CEO Pauli Undesser, MWS. “Water treatment professionals stand ready to help with certified point-of-use (POU) and point-of-entry (POE) solutions that offer consumers a reliable means to protect their homes from potential health risks associated with PFAS.”

EPA’s rule and links to fact sheets, frequently asked questions and other resources, can be found online. WQA members can refer to WQA’s PFAS Portal for tools and resources (some of the resources will be updated in coming weeks to reflect the new limits).

In addition to today’s final rule, the Biden Administration announced $1 billion to help states and territories implement PFAS testing and treatment at public water systems and to help owners of private wells address PFAS contamination. The EPA is also hosting a series of webinars – April 16, 2024, providing a general overview of the rule; April 23, 2024, for utilities and drinking water professionals; and April 30, 2024 for small systems.

The NSF Joint Committee will be having their annual regulatory meeting in May where this will be a topic of discussion regarding implementing these new regulatory levels into the suite of NSF Standards.

Want to learn more? WQA submitted comments on the EPA’s “proposed” PFAS rule last year and created a PFAS Portal, an excellent tool for water treatment professionals (resources will be updated soon to reflect the final rule).

If you have any questions, please contact the WQA Government Affairs Team at