PFAS, the “forever chemicals,” have the ability to migrate into the air, dust, food, soil and water. They are used in many common products like weatherproof clothing, non-stick cookware, and firefighting foam. PFAS are called “forever chemicals” because they are persistent and bioaccumulate. Persistent means they do not break down in the environment and bioaccumulate refers to the process of building up over time in the blood and organs.