PUBLIC AGENCY
United States Environmental Protection Agency
About this organization
EPA publishes federal biosolids information, PFAS risk assessments, draft guidance and sampling resources. These have different legal and evidentiary functions.
Sources 8
- Primary source · Government recordEPA analytical methods and sampling resources
Agency resources for sewage-sludge sampling and laboratory methods.
- Primary source · Government recordEPA announces draft biosolids risk-reduction guidance
EPA announcement dated July 1, 2026 invites comment on draft PFOA and PFOS guidance.
- Primary source · Government recordEPA draft guidance on reducing PFOA and PFOS risks in biosolids
EPA draft memorandum available as an original agency PDF.
- Primary source · Government recordEPA draft risk assessment for PFOA and PFOS in sewage sludge
EPA’s draft assessment describes modeled exposure scenarios for two PFAS compounds.
- Primary source · Government recordEPA National Primary Drinking Water Regulations, Total Trihalomethanes
EPA's National Primary Drinking Water Regulations identify Total Trihalomethanes as a regulated disinfection byproduct, set the maximum contaminant level at 0.080 mg/L, and describe potential health effects associated with long-term exposure above the MCL.
- Primary source · Government recordEPA overview of PFAS in sewage sludge
Federal agency overview of PFAS entry into wastewater and the agency’s biosolids work.
View 2 more sources
- Primary source · Government recordEPA questions and answers about its draft PFAS risk assessment
Agency explanation of risk modeling, exposure pathways, data gaps and site-specific factors.
- Secondary source / research lead · OtherUnresolved research compilation: Run 4: Science and Regulatory Record: Flies, PFAS, Biosolids, Yuma Exposure Pathways, and Official Claims
This page documents an unresolved claim or research lead. It is not a finding of fact. UNRESOLVED. SECONDARY SOURCE ONLY. This is a cleaned catalog description of an internal research compilation, not independent corroboration of its contents. Authorship and issuing authority are not independently authenticated. The raw research PDF remains private.
Timeline events 1
- EPA announces draft biosolids guidance for public comment
The July 1, 2026 agency announcement concerns PFOA and PFOS risk-reduction recommendations. It is not a national land-application ban.
Related topics 1
- Yuma Biosolids / AgTech
A source-first guide to Yuma’s biosolids debate: State Land leases, AgTech’s reported formal challenge, the City contract, fly research, PFAS questions and the records still needed.