Toxic Ghosts – The New York Times

Throughout the entire site the E.P.A. found volatile organic compounds, polychlorinated biphenyls (PCBs), and high concentrations of metals and cyanide. The creek, groundwater and the marsh were also contaminated. Arsenic, nickel, iron and manganese were discovered in plumes that flowed into the marsh and, eventually, into Country Pond, where residents in the 1970s reported fish kills.

Now, decades later, there are fresh worries that water near the site is contaminated by PFAS, a ubiquitous family of chemicals that can be found in nonstick cookware, stain-resistant rugs, firefighting foams and other common products. PFAS have been linked to a litany of serious health problems, including autoimmune diseases (like ulcerative colitis) and some cancers.