February 27, 2026
The U.S. Environmental Protection Agency (EPA) announced on February 23 the addition of sodium perfluorohexanesulfonate (PFHxS-Na) to the Toxics Release Inventory (TRI) chemicals list for reporting year 2026. This addition was formalized in a final rule published in the Federal Register on February 27, 2026.
The TRI was established under Section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA). Under the TRI program, regulated facilities that manufacture, process, or otherwise use listed chemicals above set quantities must report annually to EPA. This reporting includes releases and waste management of listed chemicals. Reporting forms are due to EPA July 1 of each year for the prior reporting year, after which EPA processes the received data and makes it publicly available. The purpose of TRI reporting and data sharing is to enable government entities, organizations, and the public to know of the facilities managing listed chemicals and of any associated releases in their community.
The addition of PFHxS-Na to the TRI is a product of the framework established under the Fiscal Year 2020 National Defense Authorization Act (NDAA), which provides for the automatic addition of per- and polyfluoroalkyl substances (PFAS) to the TRI annually when EPA takes one of a number of specified actions. One of the actions specified is when EPA finalizes a toxicity value for a given PFAS compound. That is the case with PFHxS-Na, triggering its addition to the TRI.
With the addition of PFHxS-Na, a total of 206 PFAS compounds are subject to TRI reporting. Facilities required to report under EPCRA Section 313 should track activities associated with PFHxS-Na in preparation for the July 1, 2027 reporting deadline. Due to its classification as a chemical of special concern, PFHxS-Na is subject to the lower reporting threshold of 100 pounds.