EPA links PFAS contamination in New Hampshire to Coakley Landfill Superfund site The agency says it has found some level of PFAS in all of the two dozen wells that have been sampled near Greenland, New Hampshire. Federal officials say they have linked three contaminated water wells in Greenland, New Hampshire, to the Seacoast’s Coakley Landfill Superfund site. The U.S. Environmental Protection Agency says it now knows that the landfill has impacted three nearby homes with well water that are above state limits on two harmful chemicals—PFOA, which is a common kind of PFAS, and 1,4 dioxane. The agency says it will continue testing area water supplies for chemicals indefinitely. The EPA has already found some levels of PFAS in all of the two dozen nearby wells they've sampled. They say they still can't be sure it's all from Coakley, though neighbors remain skeptical.