The EPA is correcting formatting and entry designations in a final rule that was published in the Federal Register on 26 April 2024. The rule finalized National Primary Drinking Water Regulations under the Safe Drinking Water Act for five individual per- and polyfluoroalkyl substances (PFAS): perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), hexafluoropropylene oxide dimer acid (HFPO-DA, commonly known as GenX Chemicals). The rule finalized a NPDWR for two or more mixtures of PFNA, PFHXs, HFPO-DA and perfluorobutane sulfonic acid (PFBS). This document corrects formatting and entry designations in the final regulation. Effective on 25 June 2024. POC is Alexis Lan, Office of Ground Water and Drinking Water, Standards and Risk Management Division (Mail Code 4607M), EPA, 1200 Pennsylvania Avenue NW, Washington, DC 20460; tele 202-564-0841; email address: PFASNPDWR@epa.gov (Federal Register 11 June 2024 [Rule] Pages 49101-49104)