New information is being provided by the New York State Department of Environmental Conservation about the Mahopac Business District Wells Superfund site. In 2020, PFAS contaminants were detected in groundwater from monitoring wells near Routes 6/6N and Cherry Lane at concentrations that exceed State limits. A survey of the surrounding area revealed that many properties rely on private groundwater wells for their water supply. New York State does not regulate PFAS in private wells. Sampling was conducted last year, in phases, starting with properties closest to the site. The area of interest has expanded based on the sampling results. As of this month, 113 water supply wells have been tested. With the exception of one private water supply, each had elevated levels of PFAS. Affected property owners were supplied with bottled water and offered point-of-entry treatment systems at no cost. 46 were installed. Filtration is a common process used to treat and remove contaminants from drinking water, though not all filters are effective at removing PFAS.