PFASs are a class of human-made chemicals which includes Per- and Polyfluoroalkyl substances These chemicals are very long-lived, which means that they remain in the environment and in humans and wildlife for a very long time. Two of these chemicals, PFOA and PFOS are relatively well known, and manufacturers have voluntarily stopped producing them. However, PFOA and PFAS continue to be detected at contaminated sites, in water, and in our bodies.
As the crisis in Flint, Michigan has unfolded, there has been a renewed focus on lead and other contaminants in drinking water. The Federal Government regulates lead in drinking water, primarily through the Lead and Copper Rule.