PFAS Litigation and Pollution Liability Exposure for Middle-Market Businesses in 2026
Most middle-market owners still file PFAS under someone else’s problem — a chemical-manufacturer headline, a firefighting-foam lawsuit, a story about drinking water in another state. The exposure is quietly broader than that, and the coverage that once answered it is being withdrawn in real time. Understanding where PFAS liability now sits — and where your policy has gone silent — is one of the more consequential risk questions a Tennessee business will face this year.
Start with scale, because it reframes everything that follows. The multidistrict litigation over aqueous film-forming foam, consolidated in South Carolina federal court, held 15,264 active cases as of September 2026. The settlements are already historic: 3M agreed to pay up to $12.5 billion to public water systems in 2023, and DuPont, Chemours, and Corteva together committed roughly $1.185 billion. Those are the water-provider claims alone. Verisk has projected that ground-up losses from PFAS litigation could ultimately land between $120 billion and $165 billion — a range that explains why the insurance market is behaving the way it is.
Consider what the regulation did. In May 2024, the EPA designated the two most common PFAS compounds — PFOA and PFOS — as hazardous substances under CERCLA, the federal Superfund law. That single act converted decades of ordinary industrial activity into potential cleanup liability, because CERCLA reaches back in time and spreads responsibility across everyone in the chain of contamination. The designation survived its first serious legal test when the D.C. Circuit upheld it on August 18, 2026. Separately, the EPA’s April 2024 drinking-water rule set an enforceable limit of 4 parts per trillion for PFOA and PFOS — a threshold so low it effectively assumes these compounds are everywhere.
The businesses exposed are not only chemical plants. PFAS turn up in textiles, food packaging, metal plating, cosmetics, cleaning products, and the industrial coatings that pass through countless middle-market supply chains. If your company manufactured, distributed, applied, or disposed of a product containing these compounds — often without ever knowing they were present — you sit somewhere on the liability map.
Now the coverage problem. Insurers have not waited for the losses to mature. ISO introduced a dedicated PFAS exclusion endorsement — CG 40 32 for general liability, with a parallel form for umbrella — and carriers have been attaching it to renewals across the market. Where the exclusion appears, it removes both defense and indemnity for bodily injury, property damage, and cleanup arising out of PFAS. This is the hidden line item on a renewal that reads as routine. The premium may not move; the coverage quietly does.
What the exclusion takes, the courts have not uniformly ratified — and this is where discipline earns its keep. PFAS coverage disputes have surfaced in at least ten states, and the outcomes turn on policy language and facts. Courts have split on whether the older pollution exclusion bars these claims at all. In Wolverine World Wide v. American Insurance Co., a court found the “sudden and accidental” exception could require the insurer to defend. In Colony Insurance Co. v. Buckeye Fire Equipment Co., product-based exposure was held not to be “traditional environmental pollution,” placing it outside an absolute exclusion. In Tonoga Inc. v. New Hampshire Insurance Co., sustained dumping fell squarely within the exclusion. The lesson is not that coverage always exists — it is that coverage is a document-by-document question, not a slogan.
That points to the most overlooked asset on the balance sheet: legacy policies. Because PFAS contamination typically occurred progressively over years or decades, occurrence-based general liability policies written long ago may still be triggered by exposure that happened on their watch. Old policies are not clutter — they are potential coverage. A business with any historical PFAS footprint should be locating and preserving those forms now, before a claim forces the search under pressure.
None of this is a reason to panic; it is a reason to be intentional. The answer to a shrinking pollution grant is not to hope the exclusion never bites — it is to uncover the exposure, quantify it, and design coverage around it deliberately, including the standalone pollution and environmental programs where the market still offers real capacity. That is exactly the work our 4-Step Strategic Process is built to do: Strategic Discovery to surface where PFAS may live in your operations and product history, Risk Assessment to measure the exposure against your specific footprint, Solution Design to place the right combination of standalone environmental coverage and preserved legacy policies, and Ongoing Optimization to keep the program current as the regulation and case law keep moving. The torch here is not the chemistry — it is the willingness to look where the standard policy has stopped looking.
Sources: Drugwatch — AFFF Lawsuits: September 2026 Updates; TransRe — Perfluoroalkyls and Polyfluoroalkyls (PFAS), June 2025; ConsumerNotice — PFAS Lawsuit and 3M Settlement; Inszone — PFAS Insurance Exclusions; U.S. EPA / Federal Register — PFOA and PFOS CERCLA Designation (May 8, 2024); CAC Group — Environmental Insurance Market Update; Reed Smith — Insurance Coverage Implications for PFAS-Related Liabilities; U.S. EPA — Key EPA Actions to Address PFAS
— Ryan Mefford, President & Risk Advisor