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Clean Water

2024 Draft PFAS Human Health Water Quality Criteria

February 3, 2025

Recommends water quality criteria protective of human health for PFOA, PFOS, and PFBS.

EPA “How-To” for NPDES Permit Writers

February 3, 2025

Provides a framework for states and other NPDES permit writers on implementing technology-based effluent limitations for PFAS and other pollutants of emerging concern.

USGS Predictive Model of PFAS in Water

November 20, 2024

Reports national estimates of PFAS occurrence in untreated groundwater that supplies water to public and private wells (e.g., drinking water sources) to help the public, water suppiers, and regulators understand…

Western States Water Council PFAS Roundtable Summary

November 19, 2024

Summarizes the discussion of the January 18, 2023 states-only roundtable discussion on PFAS challenges and opportunities for coordination and policy resolution.

EPA Memo to States on Addressing PFAS Discharges in NPDES Permits

April 26, 2024

Encourages states to use NPDES authorities to address PFAS pollution via monitoring and best management practices. Follows up an April 2022 memo to EPA regions on addressing discharges in EPA-issued…

U.S. EPA Amended BABA Public Interest Waiver

November 30, 2023

Amended Public Interest Waiver of Section 70914(a) of P.L. 117-58, Build America, BuyAmerica Act, 2021 for State Revolving Fund and Water Infrastructure Projects thatInitiated Design Planning prior to May 14,…

EPA Memo on Addressing PFAS Discharges in EPA-Issued NPDES Permits

January 11, 2023

Details how EPA regional water division directors should address PFAS discharges. Precedes a December 2022 memo encouraging states to include PFAS in NPDES permits.

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