EPA took the next step to implement an important per- and polyfluoroalkyl substances (PFAS) requirement of the National Defense Authorization Act (NDAA). The NDAA added 172 PFAS to the list of chemicals required to be reported to the Toxics Release Inventory (TRI) and established a 100-pound reporting threshold for these substances. The agency is publishing a final rule that officially incorporates these requirements into the Code of Federal Regulations for TRI. Per the NDAA requirements, the PFAS additions became effective as of January 1, 2020. Reporting forms for these PFAS will be due to EPA by July 1, 2021, for calendar year 2020 data.