EPA finalized a rule under the Toxic Substances Control Act (TSCA) to create the largest-ever public database of per- and polyfluoroalkyl substances (PFAS) manufactured and used in the US. The final rule expands the definition of PFAS to include 41 additional substances, and requires manufacturers that produce or have produced PFAS since Jan. 2011 to provide data on PFAS use, production volumes, disposal, exposures, and hazards. EPA plans to use the data to inform future rulemakings and enforcement. This rule went into effect Nov. 13, 2023. Read the full text of the final rule. In the rule, EPA notes it could not perform an environmental justice analysis due to the lack of data on every exposure source.