Tyndall Air Force Base — In 2024, Tyndall Air Force Base, Florida, became the first Air Force installation to transition to the fluorine-free foam within its fire departments, effectively replacing the aqueous film-forming foam that contained Per- and Polyfluoroalkyl Substances. The new foam is a primary component of a Department of Defense-wide effort to phase out PFAS-containing AFFF from land-based firefighting equipment.