Fluorochemical Manufacturing
Fluorochemical manufacturing facilities are primary point sources of PFAS environmental contamination. Companies including 3M (which produced PFOS globally until 2002), DuPont and its successor Chemours, and Daikin have operated facilities releasing PFAS through air emissions, wastewater discharge, and solid waste disposal. Contamination radii around these facilities can extend many miles, affecting multiple water supplies and creating legacy contamination that persists for decades after facility closure or process changes.
Semiconductor Manufacturing
The semiconductor industry uses PFAS compounds as etch gases, cleaning solvents, and surface treatments in chip fabrication. Major semiconductor facilities in the United States, Taiwan, South Korea, and the Netherlands have been identified as PFAS emission sources. Growing concern about semiconductor sector PFAS has drawn regulatory attention as the US expands domestic chip manufacturing under the CHIPS Act, potentially increasing PFAS use near population centers with new facility siting.
Airports and Aviation
Commercial airports have used AFFF for runway fire suppression, and training exercises have contaminated groundwater beneath and adjacent to many airports. The FAA’s mandate to maintain AFFF availability for runway safety has created tension with environmental cleanup obligations at affected airports. Airport PFAS contamination affects communities near both commercial and general aviation facilities across the country.
Textile and Carpet Manufacturing
Stain-resistant textile treatments — used on carpets, upholstery, clothing, and outdoor fabrics — have historically relied on PFAS for their oil and water repellency. Manufacturing facilities applying these treatments release PFAS into wastewater and air. Communities near textile and carpet manufacturing clusters — particularly in the southeastern United States — have experienced PFAS contamination from this industrial source category, separate from the more widely publicized military and fluorochemical manufacturing sources.