EPA Adds Another "Forever Chemical" to Its Watch List

The EPA just added another chemical to its growing PFAS watchlist. On February 23, the agency listed sodium perfluorohexanesulfonate, or PFHxS-Na, in the federal Toxics Release Inventory, a program that compels certain industries to track and disclose how hazardous chemicals are released into the environment.

Any facility that manufactures, processes, or uses PFHxS-Na above the reporting threshold must now log environmental releases and waste management activities tied to the substance. The clock started January 1, 2026, and first reports are due to the EPA by July 1, 2027.

PFHxS-Na belongs to the PFAS family, the notorious group of synthetic compounds found in everything from firefighting foams to non-stick cookware. What makes PFAS particularly troubling is their staying power: they don't break down in the environment and can accumulate in soil, water, and the human body over years of exposure.

The new listing brings the total number of PFAS chemicals tracked through the inventory to 206, a count that has climbed sharply in recent years. A congressional mandate now requires the EPA to automatically add newly reviewed PFAS compounds to the list, so that number is expected to keep rising.

The EPA says the expansion is about transparency. When industries are required to report what they release and where, regulators and communities can trace potential pollution sources and understand how hazardous substances move through the industrial system. Environmental analysts note that the data could also help utilities and regulators spot PFAS contamination upstream of drinking water supplies, and may support future enforcement actions.

Reporting requirements like this one have become a cornerstone of the federal strategy on PFAS. The science is still catching up to the scale of contamination, and the law has been slowly catching up to the science.