EPA is seeking public input and data to assist in the consideration of potential development of future regulations pertaining to PFAS under the CERCLA or Superfund. The Agency is seeking input and data regarding potential future hazardous substance designation under CERCLA of: Seven PFAS, besides PFOA and PFOS, and their salts and structural isomers, or some subset thereof; precursors (a precursor is a chemical that is transformed into another compound through the course of a degradation process) to PFOA, PFOS, and seven other PFAS; and/or categories of PFAS. Comments must be received on or before 12 June 2023. POC is Michelle Schutz, Office of Superfund Remediation and Technology Innovation (5201T), EPA, 1200 Pennsylvania Avenue NW, Washington, DC 20460; tele: 703–346–9536; email: schutz.michelle@epa.gov. (Federal Register 13 April 2023 [Proposed Rule] Pages 22399-22403).