About 7,000 local residents are served by drinking water systems that use source water contaminated by elevated levels of the so-called “forever chemicals” known as PFAS. The water systems testing positive for elevated PFAS levels are: Alpine Estates, Northwood Water Company, Kayadeross Acres, Middle Grove Mobile Park, Whispering Pines Mobile Estates, the Village of South Glens Falls, Loughberry Mobile Home Park, London Square Apartments, Diamond Point Water District, and Colebrook Trailer Court.