GOVERNMENT RECORD
EPA questions and answers about its draft PFAS risk assessment
About this source
Agency explanation of risk modeling, exposure pathways, data gaps and site-specific factors.
- Source type
- Government record
- Source classification
- Primary source
- Source date
- Not established in the reviewed record
Relevant excerpt / notes
Producer: United States Environmental Protection Agency Source class: Primary record or first-party statement. What it supports: Agency explanation of risk modeling, exposure pathways, data gaps and site-specific factors. Limitations: The 1 ppb examples are modeled scenarios, not a universal safe-or-unsafe boundary. The assessment does not model the general public as a single exposed population. Publication date: not established in this review. Reviewed September 19, 2026.
Publisher / issuing organization 1
Related claims 1
- Needs ContextIs 1 ppb a universal safe-or-unsafe cutoff for PFAS in biosolids?
The modeled value is not a universal boundary for every location or exposure.
Related articles 1
- ExplainerPFAS, Biosolids and Yuma: What the Evidence Actually Shows
PFAS occurrence is documented in biosolids research. Local concentration, exposure and responsibility require a separate chain of evidence.
Organizations 1
- United States Environmental Protection Agency
EPA publishes federal biosolids information, PFAS risk assessments, draft guidance and sampling resources. These have different legal and evidentiary functions.
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.