The primary focus of this presentation is to provide current information on the in situ management of PFAS in groundwater. The presentation will provide an overview of the most promising PFAS treatment approaches including enhanced attenuation/sequestration using colloidal activated carbon (CAC) and other amendments and engineered in situ treatment systems. It will also present the current state of knowledge related to destructive technologies and discuss whether PFAS Monitored Retention, a variant of Monitored Natural Attenuation, may be a future option in a treatment train approach. The presentation will conclude with a brief discussion on how in situ treatment fits into site management strategies.