Exposure to per- and polyfluoroalkyl substances (PFAS) in the general population has been linked to cancer, elevated cholesterol, altered immune and endocrine response, respiratory disease, and reproductive toxicity. However, PFAS exposures and health effects in firefighters are not well understood. The goal of this project is to gather further evidence on PFAS exposure in firefighters and develop best practice recommendations to reduce firefighter PFAS exposure. This project is funded by the Federal Emergency Management Agency.