Officials are investigating several fire stations between Livermore and Pleasanton for water contamination as Pleasanton continues looking for new well sites. In 2023, The San Francisco Bay Regional Water Board started to examine facilities for evidence of possible PFAS, or polyfluoroalkyl substances, in groundwater and runoff storm water in the two cities. The board chose to investigate the fire stations after Pleasanton in 2019 began shutting down its three wells due to significant PFAS contamination. The board now wants to figure out if fire-fighting foams, which contain the forever chemical, were a significant source of a massive subsurface plume of those substances.