DoD has flagged more than 700 current and former installations for possible PFAS contamination tied to aqueous film-forming foam, and the faster crews confirm releases, the faster unresolved financial liabilities pile up, Legis1 reported.

That pace is now the story. Every confirmed site, every monitoring well above the 4 parts-per-trillion line, expands the pool of potential plaintiffs — water utilities, state attorneys general, downstream property owners — who can pin damages to a specific base and a specific year of foam use.

What is actually being cleaned up?

AFFF, the fluorinated firefighting foam the military ran through hangars and runways for roughly seven decades, is the main contamination vector. Once it hits bare soil or sits in unlined pits, the perfluorinated compounds migrate into groundwater and surface water. EPA's April 2024 rule set maximum contaminant levels of 4 ppt for PFOA and 4 ppt for PFOS, the two most-studied species. That 4 ppt is now the number utilities and state regulators point to when they file cost-recovery claims.

Takeaway: 4 ppt is now the cleanup benchmark, not an aspirational target.

Where does the money come from?

DoD funds remediation on its own property under its environmental restoration authorities. Off-base drinking water is a separate ledger, and that's where the 2023 manufacturer settlements changed the math. In June 2023, 3M agreed to pay up to $12.5 billion over 13 years to public water systems that detected PFAS. Weeks later, DuPont, Chemours, and Corteva settled a multi-district litigation for roughly $1.19 billion. Both deals opened a documented path for utilities — many serving communities downgradient of bases — to recover treatment and monitoring costs.

Takeaway: the 3M and DuPont-group funds set the price tags off-base utilities will cite in their own claims.

How fast is cleanup moving?

DoD's PFAS Task Force has run a phased program since 2020, prioritizing installations with known AFFF use and off-base receptors. The department has completed or funded response actions at hundreds of sites and is sampling hundreds more. Every sampled site that comes back above 4 ppt is a potential new claim.

Takeaway: the cleanup clock and the litigation clock run on different gears, and the litigation clock is shorter.

What are states doing?

A handful of states have run ahead of EPA. New Jersey, Michigan, New York, and California have their own MCLs or guidance numbers, some stricter than 4 ppt. Their environmental agencies have also issued AFFF transition deadlines for fire departments, including those on military installations. DoD has set its own phaseout timeline for AFFF use, with the goal of zero Class B foam containing intentionally added PFAS.

Takeaway: state rules are tightening faster than federal, but new AFFF releases are ending either way.

Why is cleanup pace now a liability story?

Statutes of limitations don't wait for EPA. Water systems that didn't join the 3M class can still file individual actions, and the deadlines vary by state. At least a dozen state attorneys general maintain active PFAS suits against manufacturers. The 2022 Camp Lejeune Justice Act also opened a two-year window for exposed individuals to file administrative claims — a window that has since closed, but its precedent shows Congress is willing to carve out claims processes for military contamination.

Takeaway: each new DoD-confirmed site is a fresh anchor for a damages claim.

What is the next milestone to watch?

EPA's April 2024 designation of PFOA and PFOS as hazardous substances under CERCLA activated the Superfund pipeline for PFAS. The first military installations placed on the National Priorities List under the new rule will signal how aggressively EPA intends to push DoD toward cost recovery, and whether taxpayers or manufacturers ultimately absorb the cleanup bill.

Takeaway: the first NPL listing for a military PFAS site will set the bar for every cost-recovery action that follows.