The PFAS Litigation Explosion: Who’s Being Sued and Why
The 2023 3M settlement ($10.3 billion) and DuPont/Chemours/Corteva settlement ($1.185 billion) with US water utilities for PFAS contamination were historic—but they represent only the first chapter of PFAS litigation. As EPA’s CERCLA hazardous substance designations for PFOA and PFOS take effect, and as state and federal MCLs create defined contamination thresholds, the litigation universe is expanding dramatically. Cities, counties, water utilities, manufacturers, retailers, and even landowners now face potential PFAS liability under a complex web of federal and state legal theories.
CERCLA Liability: The Superfund Exposure
EPA’s April 2024 designation of PFOA and PFOS as CERCLA hazardous substances creates a strict liability framework—any party that arranged for disposal of PFAS-containing waste, transported it, or currently owns or operates a contaminated site can be held liable for cleanup costs. This designation creates acute exposure for: waste haulers who transported AFFF-containing wastes; industrial facilities that used PFAS in manufacturing; airports and military bases with historical AFFF use; landfills that accepted PFAS-containing materials; water utilities that applied PFAS-contaminated biosolids to land. EPA has committed to not pursue CERCLA enforcement against municipal utilities for biosolids in good faith, but private litigation from neighboring property owners is not similarly restricted.
Water Utility Suits and Pass-Through Litigation
Water utilities that settled with 3M and DuPont are now pursuing second-tier defendants—other AFFF manufacturers (Tyco Fire Products, Kidde, Chemguard, Archroma) whose contributions to contamination were not resolved in the primary settlements. The MDL 2873 proceeding in South Carolina, which consolidated over 4,000 cases, continues with new defendants and new plaintiffs. Simultaneously, utilities facing EPA compliance costs for PFAS treatment infrastructure—estimated at $380 billion nationally over 20 years—are passing costs to ratepayers while pursuing litigation against manufacturers to recoup compliance expenditures.
State Consumer and Property Damage Claims
Beyond industrial defendants, PFAS litigation is reaching into new sectors. States including Illinois, New York, and California have sued retailers (Amazon, Walmart) and manufacturers for PFAS-containing products sold without adequate disclosure. Property damage suits from homeowners near contaminated sites—where well water exceeds MCLs—are proliferating in Michigan, Maine, Colorado, and Minnesota. Personal injury suits alleging specific cancers (kidney, testicular, thyroid) from PFAS exposure in drinking water are advancing through state courts, with several bellwether trials scheduled for 2025–2026. Law firms specializing in mass tort litigation are actively recruiting plaintiffs in PFAS-impacted communities.
Regulatory Compliance as Liability Shield
For organizations operating in the PFAS space, regulatory compliance increasingly serves as a litigation risk management tool. Water utilities that can document proactive PFAS monitoring, timely community notification, and rapid implementation of treatment solutions are better positioned in consumer and citizen suit litigation than those with reactive approaches. For filter manufacturers, maintaining NSF/ANSI certification for PFAS claims and accurately representing removal efficacy in marketing materials is critical—false advertising claims about PFAS reduction are an emerging litigation vector. Companies that can demonstrate third-party certified, independently validated PFAS removal performance have a clear legal and commercial advantage.
PFAS litigation is no longer exclusively a problem for chemical manufacturers—it has become a broad corporate risk requiring proactive legal, compliance, and technical strategies across every sector that touches fluorochemicals.