The New Hampshire Department of Environmental Services (NHDES) is engaged in an ongoing investigation into per- and polyfluoroalkyl substances (PFAS) in New Hampshire drinking water. New Hampshire and several other northeast states are dealing with several sites where there have been widespread PFAS impacts on drinking water supplies. The following are answers to some Frequently Asked Questions about the issue.

FAQs: PFAS Drinking Water MCLs, Update November 4, 2019