PFOS

PFOS (Perfluorooctane Sulfonate) is a man-made chemical, part of the PFAS family, known for repelling water, grease, and stains, used in products like carpets, cookware, and firefighting foams; it’s a persistent environmental pollutant found globally, linked to health concerns like increased cholesterol, liver damage, and potential cancer, leading to phased-out production and EPA advisories.