EPA expands TRI PFAS reporting: adds sodium perfluorohexanesulfonate (PFHxS‑Na) as a chemical of special concern

US EPA finalized a rule adding sodium perfluorohexanesulfonate (PFHxS‑Na) to the Toxics Release Inventory (TRI) as a PFAS chemical of special concern. Covered TRI facilities must begin tracking and reporting PFHxS‑Na releases and waste management. EPA indicates the first reporting period began January 1, 2026, with first TRI reports due July 1, 2027; PFHxS‑Na is subject to a 100 lb reporting threshold as a chemical of special concern. Compliance teams should update TRI chemical lists, reporting workflows, and supplier/material data collection to capture PFHxS‑Na where present in operations or waste streams.