1-Hexanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,6-tridecafluoro-, potassium salt

Past use in aqueous film‑forming foams (AFFF), industrial surfactants, and treatment of textiles and paper; contamination occurs near airports, military bases, and fluorochemical plants [1][2].

Drinking water, fish and other foods from contaminated areas, indoor dust, and certain jobs (firefighting, fluorochemical manufacturing, metal plating) [1][3].

PFHxS can remain in the body for years and has been linked to higher cholesterol, changes in liver enzymes and thyroid hormones, reduced vaccine antibody response, and developmental effects [1][3].

People using contaminated private wells or small systems; communities near AFFF use sites or industrial discharges; workers; pregnant people, infants, and children [1][2][3].

Check local water quality; use water that meets EPA’s new PFAS drinking-water standards or use certified filters (reverse osmosis or activated carbon) or bottled water for drinking/cooking; follow fish advisories; reduce indoor dust (wet mopping/HEPA vacuum); avoid stain‑resistant products when possible; don’t stop breastfeeding based on PFAS alone—ask your clinician [2][3][1].