In brief
The E.P.A. has highlighted concerns over 'forever chemicals' in fertilizers, signaling potential health risks linked to PFAS contamination in sewage sludge, with implications for future regulations.
In a groundbreaking announcement, the Environmental Protection Agency (E.P.A.) has raised concerns regarding "forever chemicals" found in sewage sludge that is often repurposed as fertilizer. The agency reported that these chemicals, known as per- and polyfluoroalkyl substances (PFAS), can pose significant health risks, exceeding safety thresholds “by several orders of magnitude” in some instances. While the E.P.A. assures that the overall food supply remains safe, the findings are alarming, as PFAS, commonly found in products like nonstick pans, do not easily break down in the environment.Research has shown that using tainted sludge as fertilizer can lead to contamination of soil, crops, and groundwater, potentially affecting livestock as well. Notably, documents previously revealed that 3M, a long-time PFAS manufacturer, had uncovered PFAS presence in sludge samples as early as 2000, yet the E.P.A. has historically lacked regulations on PFAS levels in such fertilizers.This recent draft risk assessment marks a crucial shift toward possible regulation of PFAS in sewage sludge, a practice widely known in the industry as biosolids. Currently, the E.P.A. regulates certain heavy metals and pathogens in sludge but has excluded PFAS from these limits. As part of broader efforts to tackle PFAS contamination, the Biden administration has implemented restrictions on PFAS in drinking water and classified two PFAS types as hazardous waste under Superfund cleanup laws, responding to evidence of no safe exposure level for these substances.
