In-depth guide

UPDATED FEB 2026

AFFF Water Contamination Lawsuit

Part of the AFFF Firefighting Foam investigation

The short answer

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.

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The Scale of PFAS Water Contamination

The EPA estimates that per- and polyfluoroalkyl substances are present in the drinking water of approximately 100 million Americans. PFAS contamination of drinking water is the primary exposure pathway for the general public — far more people have been exposed through water than through direct AFFF handling. The contamination stems from AFFF use at military bases, airports, fire training facilities, and industrial sites, where PFAS compounds migrate from the point of release through soil into groundwater aquifers that supply wells and municipal water systems.

PFAS are uniquely problematic as water contaminants because of their extreme persistence, high water solubility, and mobility in groundwater. Unlike many organic contaminants that adsorb to soil particles or degrade over time, PFAS travel long distances through aquifers and can contaminate water supplies miles from the original release point. Once in a water system, they cannot be removed by conventional water treatment processes — only advanced treatment technologies such as granular activated carbon filtration, ion exchange, or high-pressure membrane systems can reduce PFAS to acceptable levels.

The EPA's April 2024 finalization of the first-ever enforceable PFAS drinking water standards — setting maximum contaminant levels of 4 parts per trillion for PFOA and 4 ppt for PFOS — fundamentally changed the legal landscape. The standard confirmed that PFAS levels previously considered acceptable by many state regulators were in fact unsafe. Water systems nationwide must now test for PFAS and implement treatment if levels exceed the MCLs. The cost of compliance is estimated in the tens of billions of dollars — costs that water providers are seeking to recover from AFFF manufacturers.

Personal Injury Claims for Water Contamination Exposure

While the water utility settlement track in MDL 2873 has been largely resolved — with 3M ($10.3B), DuPont/Chemours/Corteva ($1.185B), Tyco ($750M), and BASF ($316.5M) reaching settlements — the personal injury claims from individuals who drank contaminated water remain active and are advancing toward bellwether trials. Water utility settlements compensate water systems for treatment costs; personal injury claims compensate individuals for the health consequences of drinking contaminated water.

Community residents who drank PFAS-contaminated water and have been diagnosed with a linked condition — kidney cancer, testicular cancer, thyroid disease, ulcerative colitis, liver damage, or non-Hodgkin lymphoma — have viable personal injury claims. The strength of these claims depends on the duration and level of contamination at the water source, the availability of water quality testing data, the individual's residential history, and ideally, blood PFAS testing showing elevated levels.

Individuals in communities with known PFAS water contamination should gather their residential history (addresses and dates), available water quality test results from their water provider, blood PFAS testing results if available, and complete medical records for any diagnosed condition. Local health departments and water utilities may have historical water quality data that can help establish exposure levels and duration.

Research & evidence

Scientific Evidence

meta-analysis

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
retrospective

"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
cohort

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

FAQ

Frequently Asked Questions

36 QUESTIONS

The primary categories of eligible plaintiffs include: firefighters (municipal, airport, military, or industrial) who handled AFFF during training or fire suppression; military personnel stationed at bases where AFFF was used or stored (the DoD has identified 455+ contaminated installations); military families who lived on or near contaminated bases; community residents whose drinking water was contaminated by PFAS from nearby military bases, airports, or fire training facilities; and industrial workers at PFAS manufacturing plants. Linked conditions include kidney cancer, testicular cancer, thyroid disease, ulcerative colitis, liver damage, non-Hodgkin lymphoma, and high cholesterol. Attorneys handle these cases on contingency — fee terms vary by attorney.

Dive deeper

Related Guides

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The full investigation

Part of the AFFF Firefighting Foam Investigation