The Environmental Protection Agency finalized a rule that improves reporting on per- and polyfluoroalkyl substances to the Toxics Release Inventory by eliminating an exemption that allowed facilities to avoid reporting information on PFAS when those chemicals were used in small concentrations. By designating PFAS as “chemicals of special concern” for TRI-reporting purposes, this rule eliminates the availability of that exemption for TRI-listed PFAS and requires facilities to report on PFAS regardless of their concentration in mixtures, since many PFAS are used in low concentrations in mixtures, and the continued availability of the exemption for PFAS would permit facilities to discount those uses when determining their TRI reporting responsibilities. The rule also makes the previous exemption unavailable for purposes of supplier notification requirements to downstream facilities for all chemicals on the list of chemicals of special concern, which also includes additional chemicals that, like PFAS, remain in the environment for long periods of time and build up in the body like lead, mercury, and dioxins. More information on the final rule can be found here.