EPA final rule adds sodium perfluorohexanesulfonate (PFHxS‑Na) to TRI as a PFAS chemical of special concern (100 lb threshold); reporting starts 2026 with first reports due July 1, 2027

US EPA finalized a TRI rule adding sodium perfluorohexanesulfonate (PFHxS‑Na) to the Toxics Release Inventory as a PFAS chemical of special concern. Facilities subject to TRI must begin tracking releases and other reportable waste management quantities for PFHxS‑Na for the reporting period beginning January 1, 2026. The first Form R submissions covering PFHxS‑Na will be due July 1, 2027. The rule applies a 100 lb reporting threshold as a chemical of special concern, increasing compliance and data management obligations for TRI reporters handling PFHxS‑Na.