An industrial area in Castanea Township adjacent to Lock Haven was placed on the National Priorities List of uncontrolled hazardous waste sites (commonly referred to as Superfund sites) in 1982. Drake Chemical, which went bankrupt in 1981, made ingredients for pesticides and other compounds at the site from the 1960s to 1981. Starting in 1982, the United States Environmental Protection Agency began a clean-up of contaminated containers, buildings, and soils at the site and by the late 1990s had replaced the soils. Equipment to treat contaminated groundwater at the site was installed in 2000 and continues to operate.