Firefighters: The Most Exposed Population
Firefighters represent the population with the most direct, intense, and prolonged exposure to AFFF and its PFAS components. Municipal fire departments, airport fire crews, and military crash rescue units used AFFF in routine training exercises — often multiple times per month — for decades. During training, firefighters waded through pools of foam, sprayed it from hoses at close range, and cleaned up foam residue by hand, all without the chemical-resistant personal protective equipment (PPE) that would be required for handling known toxic substances. PFAS were absorbed through the skin, inhaled as foam mist, and inadvertently ingested.
Studies consistently show that firefighters have PFAS blood concentrations 2 to 10 times higher than the general population. A 2022 study published in the International Journal of Environmental Research and Public Health found that career firefighters had significantly elevated levels of PFOS, PFHxS, and other PFAS compounds compared to non-firefighter controls, with the highest levels found in those with the most years of AFFF-related training. The National Institute for Occupational Safety and Health (NIOSH) has identified elevated cancer rates among firefighters, with PFAS exposure from AFFF recognized as a significant contributing factor.
The occupational exposure pathway for firefighters is particularly well-documented, which strengthens their legal claims. Fire department training records, employment histories, and department protocols for AFFF use provide clear evidence of exposure timing, frequency, and duration. Many departments maintained logs of training exercises that can be matched to individual firefighters' work schedules. This level of documentation is a significant advantage in establishing causation.
Presumptive Cancer Laws and Firefighter Protections
Many states have enacted "presumptive cancer" laws that presume certain cancers diagnosed in firefighters are occupationally caused, shifting the burden of proof from the firefighter to the employer or insurer. While these laws primarily affect workers' compensation claims against fire departments and municipalities, they reflect the legislative recognition that firefighters face elevated cancer risks from occupational exposures including AFFF.
The AFFF product liability litigation is separate from workers' compensation — it targets the manufacturers of AFFF and PFAS (3M, DuPont, Tyco, BASF), not the fire departments that used the products. Firefighters can pursue both workers' compensation benefits and AFFF product liability claims simultaneously. The product liability claims allege that manufacturers knew AFFF was toxic and failed to warn firefighters, fire departments, or the public about the health risks.
Firefighters considering AFFF claims should gather their employment records showing dates of service, training records documenting AFFF use, any PFAS blood testing results, and medical records for their diagnosed condition. Department records of AFFF purchases and training exercises provide supporting evidence. Fire union representatives and department safety officers may also be able to provide relevant documentation.
Scientific Evidence
Meta-Analysis of PFAS Exposure and Cancer Risk: Kidney and Testicular Cancer
Mastrantonio M, Bai E, Uccelli R, Cordiano V, Screpanti A, Corigliano P. (2023). La Medicina del Lavoro
Key Findings
- Relative risk of 1.74 for kidney cancer among individuals with high PFAS exposure compared to low-exposure controls
- Relative risk of 2.22 for testicular cancer among individuals with high PFAS exposure — the strongest relative risk of any PFAS-cancer association
- Dose-response relationship demonstrated: higher PFAS blood levels correlated with progressively higher cancer risk
- Results consistent across multiple study designs and populations, strengthening the causal inference
"The Devil They Knew": Industry Knowledge of PFAS Dangers Since 1970
Brennan NM, Evans AT, Fritz MK, Peak SA, von Holst HE. (2023). Annals of Global Health
Key Findings
- PFAS manufacturers knew about the persistence and toxicity of their products as early as 1970 — more than 50 years before widespread public awareness
- 3M conducted internal studies showing PFAS bioaccumulation in worker blood at 1,000 times normal levels and animal studies showing tumor formation, then classified results as confidential
- Manufacturers used trade secret protections and proprietary research agreements to prevent damaging findings from reaching regulators or the public
- The pattern of corporate concealment parallels the tobacco and asbestos industries and supports punitive damages claims based on willful and malicious conduct
C8 Science Panel: Probable Link Evaluations for PFOA-Associated Diseases
Fletcher T, Savitz D, Steenland K. (2012). Environmental Health Perspectives
Key Findings
- Determined "probable link" between PFOA exposure and six diseases: kidney cancer, testicular cancer, thyroid disease, ulcerative colitis, high cholesterol, and pregnancy-induced hypertension
- Study population of 69,000 residents made it one of the largest PFAS health studies ever conducted, providing exceptional statistical power
- Findings have been cited in virtually every subsequent PFAS lawsuit and regulatory action worldwide
- The "probable link" standard — requiring more than just association but less than definitive proof — was a negotiated scientific threshold that has become the benchmark for PFAS causation evidence
Frequently Asked Questions
Related Pages
3M & DuPont PFAS Lawsuit
3M and DuPont are the two primary defendants in the AFFF/PFAS litigation. 3M manufactured PFOS-based AFFF from the 1960s and has already paid $10.3 billion in water utility settlements and $850 million to Minnesota. DuPont manufactured PFOA and was the target of the landmark Bilott litigation that created the C8 Science Panel. Internal documents from both companies show they knew about PFAS toxicity for decades and concealed it. Their corporate successors — Chemours, Corteva, and others — share in the liability.
AFFF Kidney Cancer Lawsuit
Kidney cancer (renal cell carcinoma) has the strongest scientific link to PFAS exposure of any cancer. IARC classified PFOA as a Group 1 carcinogen based largely on kidney cancer evidence. Meta-analyses show a relative risk of 1.74 for kidney cancer at high PFAS exposure levels. The C8 Science Panel determined a "probable link" between PFOA and kidney cancer based on the 69,000-person Mid-Ohio Valley study. Firefighters and military personnel with kidney cancer and AFFF exposure history have among the strongest claims in MDL 2873.
AFFF Military Base Contamination
The Department of Defense has identified PFAS contamination at more than 455 military installations where AFFF was used for fire training and emergency response. Air Force bases, Naval air stations, and Marine Corps installations are the most heavily affected. Service members, their families, and surrounding communities were exposed for decades through contaminated drinking water. Military personnel can file AFFF lawsuits against the foam manufacturers while also receiving VA benefits.
AFFF Settlement Amounts
AFFF/PFAS litigation has produced over $12.5 billion in water utility settlements and $670.7 million in C8 personal injury settlements. The personal injury track in MDL 2873 — with 15,216+ claims — is advancing toward bellwether trials that will establish settlement benchmarks. Based on the C8 precedent (averaging ~$189,000 per claim) and the severity of PFAS-linked conditions, projected personal injury settlements range from $25,000 for moderate cases to $2 million or more for severe cases.
AFFF Testicular Cancer Lawsuit
Testicular cancer has the highest relative risk of any PFAS-linked cancer, with meta-analyses showing RR=2.22 for high PFAS exposure — meaning more than double the cancer risk. The C8 Science Panel determined a "probable link" between PFOA and testicular cancer. Testicular cancer is most common in younger men (ages 15-35), making it particularly relevant for military personnel and younger firefighters exposed to AFFF early in their careers.
AFFF Thyroid Disease Lawsuit
Thyroid disease is one of six conditions with a C8 Science Panel "probable link" to PFOA exposure. PFAS are potent endocrine disruptors that interfere with thyroid hormone synthesis and metabolism, causing hypothyroidism, hyperthyroidism, and thyroid cancer. Thyroid disease is often the earliest clinical manifestation of PFAS exposure and may affect a broader population than PFAS-linked cancers, making it significant for the AFFF litigation.
AFFF Water Contamination Lawsuit
PFAS from AFFF have contaminated the drinking water of an estimated 100 million Americans. Water utility settlements exceeding $12.5 billion have been approved in MDL 2873, but personal injury claims from individuals who drank contaminated water remain active. The EPA's 2024 drinking water standard of 4 ppt for PFOA/PFOS confirmed that previously "safe" levels were actually harmful. Community residents who developed PFAS-linked diseases from contaminated water have viable personal injury claims.
AFFF Firefighting Foam Lawsuit
AFFF firefighting foam containing per- and polyfluoroalkyl substances (PFAS) has been used since the 1960s at military bases, airports, and fire training facilities across the United States. These "forever chemicals" do not break down in the environment and have contaminated groundwater, soil, and drinking water supplies serving millions of Americans. The C8 Science Panel established "probable links" between PFAS exposure and six diseases including kidney cancer, testicular cancer, and thyroid disease. MDL 2873, consolidated before Judge Richard Gergel in the District of South Carolina, encompasses over 15,216 personal injury claims against manufacturers including 3M, DuPont, Chemours, Tyco Fire Products, and BASF. Water utility settlements exceeding $12.5 billion have been approved, and the personal injury track is advancing toward bellwether trials with Daubert motions and expert depositions underway.
View full case overview