Per- and polyfluoroalkyl substances, or PFAS, are a group of about 5,000 manmade fluorinated chemicals, widely used to produce waterproof and stain-resistant textiles. These chemicals, which don’t break down naturally, are known as “forever chemicals.” But they are also water soluble, polluting soil and nearby drinking-water sources.” It is estimated that PFAS are in 99% of Americans’ blood, and...