This SERDP and ESTCP webinar discusses approaches to better characterize per- and polyfluoroalkyl substances (PFAS) fate and transport in the subsurface, as well as a novel technology for PFAS destruction. Specifically, investigators present results of experiments, mathematical modeling, and decision tool development to further understand PFAS fate and transport in the subsurface as well as a novel technology to treat PFAS in water and other high moisture content wastes.