The U.S. Geological Survey announced Wednesday that forever chemicals known as PFAS have been found in untreated well water throughout Delaware. Per-and polyfluoroalkyl substances, or PFAS, are a group of more than 4,000 manmade chemicals used to make fluoropolymer coatings and products that resist heat, oil, stains, grease, and water. According to the Centers for Disease Control, fluoropolymer coatings can …