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ARTICLE · 07 MAY 2025

EPA Extends Comment Period On Draft Risk Assessment For PFOA And PFOS In Biosolids

EPA will now accept public comments on its Draft Sewage Sludge Risk Assessment for Perfluoroctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS) until August 15, 2025.

United StatesEnvironment

Update: EPA will now accept public comments on its Draft Sewage Sludge Risk Assessment for Perfluoroctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS) until August 15, 2025. Interested parties may submit comments at regulations.gov (Docket ID EPA-HQ-OW-2024-0504).

  • What Happened? The U.S. Environmental Protection Agency (EPA) issued its long-promised Draft Risk Assessment for PFOA and PFOS in Sewage Sludge (Draft Risk Assessment) on January 14, 2025, just before the change in administration. The Draft Risk Assessment aims to characterize potential human health and environmental risks associated with land application as a fertilizer of sewage sludge (biosolids) that contain PFOA or PFOS. Recycling biosolids to farmland is one of the largest recycling practices in the world and has been practiced across the U.S. for over 50 years pursuant to federal regulation under the Clean Water Act. In the January Draft Risk Assessment, EPA concluded that biosolids

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