EPA Adds PFHxS-Na to Toxics Release Inventory (TRI)

On February 23, 2026, US EPA announced a Final Rule to add sodium perfluorohexanesulfonate (PFHxS-Na) to the Toxics Release Inventory (TRI) list of reportable substances under EPCRA. 

With this addition, PFHxS-Na becomes one of 206 per- and polyfluoroalkyl substances (PFAS) covered by the EPCRA TRI chemical release reporting program. Like other PFAS, this substance is being added to the TRI as a “chemical of special concern” and assigned a reporting threshold quantity of 100 pounds. 

The first TRI “reporting period” for PFHxS-Na is already underway; it began on January 1, 2026. The first reports addressing the newly added PFAS are due July 1, 2027. 

PFHxS-Na is a sodium salt of PFHxS, a chemical EPA added to the TRI in 2020 (along with 171 other PFAS). It is used in firefighting foams, surface coatings, and for plating and polishing metals.    

What is TRI Reporting?

EPA regulations in 40 CFR Part 372 mandate reporting from facilities in specific industry sectors that manufacture, process, or handle any listed chemical in a quantity that exceeds its regulatory threshold (and have 10 or more employees). 

• For details about reporting thresholds, covered industries, and lists of “reportable” chemicals, see the EPCRA TRI Reporting Cheat Sheet. 

For each listed chemical in 40 CFR 372.28, reporting facilities submit details about activities and use, quantities present on site, source reduction and waste management, and the amount of the chemical that entered the environment through each “medium”—i.e., air emissions, discharges to surface water, and/or releases to land (including underground injection wells). 

The TRI reporting rule applies to about 800 chemical substances shown to have acute or chronic health and/or environmental effects. That includes widely used substances like methylene chloride, ethylene, hydrochloric acid, and ammonia, as well as hundreds of PFAS chemicals added to the program in recent years. 

EPA Press Release:
EPA Expands Toxic Chemical Reporting, Strengthening Transparency on PFAS Pollution 

Stay Up to Date on New PFAS Regulations (and More!) 

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