PFAS refers to per- and poly- fluoroalkyl substances which are chemicals used to make products which resist heat, stains, grease, and water. PFAS remain in the environment, including water and soil, for a long time. PFAS chemicals can build up in the body and take a long time to be removed.
They have been widely used in industrial and consumer products since the 1950s. They have often been used in stain and water protection for carpets, fabric, furniture, and apparel; paper coating (including for some food packaging); metal plating; photographic materials; aviation hydraulic fluid; cosmetics and sunscreen, medical devices.
There is no odour or taste associated with PFAS and it can only be detected with specific testing.