The EPA’s 2024 Superfund rule changed how airports must manage releases of PFOA and PFOS. Public airports face distinct concerns because many historically stored or used aqueous film-forming foam. EPA has offered enforcement discretion for publicly owned airports under certain circumstances. That policy reduces one federal risk but does not eliminate every reporting duty or cleanup expense.
Why Airports Face Distinct PFAS Exposure
Airports used aqueous film-forming foam, commonly called AFFF, to control dangerous fuel fires. Foam is released onto airport property through:
- Training exercises,
- Equipment tests,
- Hangar systems, and
- Emergency responses.
PFAS from those releases can move through soil, stormwater, and groundwater. Contamination may remain onsite or migrate toward nearby water supplies and private property.
What the 2024 CERCLA Rule Changed
EPA designated PFOA and PFOS as hazardous substances under CERCLA, commonly called Superfund. The designation includes their salts and structural isomers. The final rule took effect on July 8, 2024. It activates federal reporting, investigation, cleanup, and cost-recovery tools for qualifying releases.
When Airport Releases Must Be Reported
Each substance has a one-pound reportable quantity during any 24-hour period. A covered release meeting that threshold requires immediate notice to the National Response Center. EPCRA also requires state or Tribal notice and local or Tribal emergency planning notice. A written EPCRA follow-up generally must be submitted within 30 days.
The Rule Includes Public Notice
CERCLA also requires reasonable newspaper notice to potentially injured parties in the affected area. Continuous releases stable in quantity and rate may qualify for reduced reporting. Other statutory exceptions may apply to particular airport operations or permitted discharges. EPA’s PFAS release-reporting guidance provides the current federal framework.
EPA Offers Discretion for Public Airports
EPA’s PFAS enforcement discretion policy expressly identifies publicly owned airports. The agency generally does not intend to pursue them when equitable factors oppose enforcement. EPA instead prioritizes manufacturers, manufacturing users, federal facilities, and major industrial contributors. The policy recognizes that airports performed public safety duties and did not manufacture PFAS.
The Policy Does Not Create Immunity
Enforcement discretion is administrative guidance, not a statutory exemption from CERCLA. EPA evaluates each site under its facts, circumstances, and equities. The policy also cannot bind state regulators, neighboring landowners, or other private claimants. Airport ownership, AFFF use, release history, and current management practices still matter.
Public and Private Airports Face Different Risks
EPA’s listed category covers publicly owned airports, including state or municipal airports. Privately owned airports do not receive that categorical treatment. Federal facilities remain among EPA’s stated enforcement priorities when they caused PFAS contamination. Mixed ownership or operating agreements may require a closer legal and factual review.
Recovery of Cleanup Costs
An enforcement policy does not pay for investigation, treatment, or regulatory compliance. Airports may need to fund:
- soil sampling,
- groundwater monitoring and treatment,
- foam replacement,
- system decontamination.
- stormwater controls,
Many airports are seeking to recover these costs by filing legal actions against the companies that manufactured and sold firefighting foam. Our airport PFAS and AFFF claims page describes common cost-recovery issues.
Airport Records Can Define the Claim
Airports should preserve AFFF purchase records, safety manuals, training logs, and incident reports. Maps should identify storage areas, hangars, training grounds, drains, and known discharge points. Sampling data, contracts, invoices, and communications can help trace sources and quantify losses. These materials may also show compliance efforts and support EPA’s equitable analysis.
Evaluate Costs and Recovery Rights
Early source analysis may identify foam sellers, manufacturers or other parties responsible for airport contamination. Potential damages can include past costs and reasonably anticipated future expenses. Our article on airport PFAS cleanup and recovery costs explains several major categories. Experienced legal counsel can evaluate reporting duties, outside claims, available defenses, and possible recovery rights.
