# Designation of Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) as CERCLA Hazardous Substances
> **Rule** · Final rule. · Published 2024-05-08 · Effective 2024-07-08 · 89 FR 39124
## Document
- **Document number:** 2024-08547
- **Category:** superfund
- **Federal Register citation:** 89 FR 39124
- **CFR reference:** 40 CFR 302
- **Publication date:** 2024-05-08
- **Effective date:** 2024-07-08
- **EPA docket:** EPA-HQ-OLEM-2019-0341
## Abstract

Pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act ("CERCLA" or "Superfund"), the Environmental Protection Agency (EPA) is designating two per- and polyfluoroalkyl substances (PFAS)--perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers--as hazardous substances. The Agency reached this decision after evaluating the available scientific and technical information about PFOA and PFOS and determining that they may present a substantial danger to the public health or welfare or the environment when released. The Agency also determined that designation is warranted based on a totality of the circumstances analysis, including an analysis of the advantages and disadvantages of designation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/05/08/2024-08547/designation-of-perfluorooctanoic-acid-pfoa-and-perfluorooctanesulfonic-acid-pfos-as-cercla-hazardous)
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