What specific PFAS substances and drinking water limits did the Biden administration set in April 2024, and what were the original compliance deadlines?

In April 2024, the Biden administration set a drinking water limit of 4 parts per quadrillion (ppt) for two primary PFAS substances—perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS)—with a requirement for water systems to complete monitoring and reporting by 2027 and achieve full compliance by 2029.

What is the EPA’s new proposal regarding PFAS compliance deadlines, and how does it change the timeline for public water systems?

The EPA, under Administrator Lee Zeldin, has proposed a voluntary extension mechanism allowing eligible public water systems to apply for up to a two-year delay in meeting PFAS compliance, pushing the final deadline from 2029 to as late as 2031, while systems choosing not to apply for the extension remain subject to the original 2029 deadline.

US EPA Proposes Extension for Drinking Water PFAS Compliance Deadlines

May 22, 2026

The US EPA proposes extending drinking water PFAS compliance deadlines to 2031 due to operational burdens, while the American Chemistry Council calls for stricter scientific support for pollutant limits.

ccin

2026-05-22

US EPA Proposes Extension for Drinking Water PFAS Compliance Deadlines

US EPA Proposes Extension for Drinking Water PFAS Compliance Deadlines

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