PFAS is shorthand for perfluoroalkyl and polyfluoroalkyl substances. The synthetic chemicals have been used for decades to make products that repel oil and water such as nonstick cookware, waterproof ...

Outside a home tucked down a dirt road in Mora County, environmental engineer Tom Brown dumped out a 5-gallon bucket of well water, then another, tracing a path from a well-cared-for wooden wellhouse ...