The Fossil Fuel and PFAS Connection
The relationship between the petrochemical industry and PFAS is bidirectional: petrochemical companies both manufacture PFAS precursors and consume PFAS products extensively in their operations. Refineries, petrochemical plants, liquefied natural gas (LNG) facilities, and oil and gas extraction operations all use PFAS-containing products—from AFFF fire suppression systems to fluoropolymer process equipment linings, from PFAS-based drilling fluids to PFAS-treated protective clothing for workers. The environmental footprint of this relationship extends from oil fields to refineries to product distribution infrastructure.
PFAS in Upstream Oil and Gas Operations
Hydraulic fracturing (fracking) operations use PFAS-containing surfactants as friction reducers and clay stabilizers in fracturing fluid formulations. Fluorosurfactants improve fluid performance at high temperatures and pressures encountered deep underground, reducing friction that would otherwise require higher pump pressures. Studies of groundwater near fracking operations in the Permian Basin, Appalachian Basin, and other shale production areas have detected PFAS compounds consistent with fracturing fluid additive formulations, raising concerns about pathway from wellbore to aquifer.
Produced water—the large volumes of water extracted from oil and gas formations along with petroleum—contains PFAS at measurable concentrations in some formations, particularly where naturally occurring PFAS-like compounds (which exist in certain geological formations) mix with PFAS introduced through drilling and completion operations. Disposal of produced water through underground injection or surface discharge represents a potential PFAS release pathway that is beginning to receive regulatory attention from state oil and gas regulatory agencies.
Refinery and Terminal Fire Suppression Systems
Petroleum refineries and bulk liquid storage terminals face severe fire risk from highly flammable hydrocarbon products. AFFF-based fire suppression systems have been the industry standard for decades, with large foam concentrate storage tanks at tank farms representing significant PFAS inventories. Uncontrolled AFFF releases during actual fire incidents—as well as training exercises, system tests, and equipment failures—have produced PFAS groundwater contamination at hundreds of refinery and terminal sites worldwide.
The transition from PFAS-based AFFF to fluorine-free foams (F3) is proceeding in the petroleum industry, but the pace varies significantly by jurisdiction, facility age, and regulatory pressure. The API (American Petroleum Institute) has published F3 transition guidance acknowledging both the environmental imperative and the technical performance questions that remain for certain extreme fire scenarios. Several major oil companies—including BP, Shell, and TotalEnergies—have made corporate commitments to F3 transition timelines, while independent refinery operators face higher capital barriers to system replacement.
Regulatory Outlook for Petroleum Industry PFAS
The EPA’s PFAS effluent guidelines development process has included petroleum refining as a category under review for PFAS-specific discharge limits. Many refineries discharge to surface waters under NPDES permits that currently lack PFAS-specific requirements; the addition of PFAS limits would require wastewater treatment upgrades at numerous facilities. State programs in California, Texas, and Louisiana—home to major refinery concentrations—are developing PFAS monitoring requirements for petroleum facility stormwater and process water discharges that will drive the next wave of site characterization and compliance investment in this sector.