PFAS could nearly double the Coast Guard's $448M cleanup bill
Summary
A GAO audit found the Coast Guard reported about $448 million in environmental cleanup liabilities for its $28 billion shore infrastructure portfolio as of September 2025 -- but hasn't told Congress that 'forever chemical' (PFAS) contamination at 34 identified sites could add hundreds of millions more. Using the Pentagon's own per-site PFAS cleanup average, that potential exposure alone comes close to matching everything the Coast Guard has reported so far, combined. GAO also found the agency has never set objectives or performance measures for the program at all.
A $448 million bill, split two ways
About $228 million of the total covers structures -- like housing -- presumed contaminated with asbestos or lead-based paint based on their age. The other roughly $220 million covers cleanup projects at sites with a known or suspected release of contaminants⧉. The total has grown steadily, from about $358 million in fiscal 2016 to $448 million by September 2025 -- part of a broader federal pattern: government-wide environmental liabilities grew from $447 billion to $645 billion over roughly the same period, a trend has flagged as high-risk since 2017.
View data as table
| Structures presumed contaminated (asbestos/lead paint) | 228,000,000 |
|---|---|
| Cleanup projects (known/suspected contamination) | 220,000,000 |
The 'forever chemical' problem nobody's counted yet
None of the $448 million includes -- synthetic chemicals used for decades in firefighting foam that persist in soil and water and have been linked to cancer. The Coast Guard's own May 2025 assessment⧉ found 34 sites, mostly airfields, need further action; 30 were under site inspection and 3 under deeper investigation as of July 2025. For scale, the Pentagon estimated it will cost at least $7 billion to investigate and remediate at 580 installations -- $12.2 million per site on average, and itself says that DoD estimate is likely too low. Applying that same average to the Coast Guard's 34 sites -- our own calculation, not a figure -- puts the potential exposure at roughly $415 million, nearly matching everything currently on the books. 's own language is more cautious: 'could increase fiscal exposure by hundreds of millions of dollars,' without a single point estimate.
View data as table
| Total reported environmental liability | 448,000,000 |
|---|---|
| Potential PFAS exposure at 34 sites (DoD per-site average) | 414,800,000 |
The uncertainty cuts both ways. Coast Guard officials told that cleanup technology remains limited, though it's evolving quickly, and that they don't yet know how long full remediation might take -- a genuine scientific and regulatory unknown, not just a reporting gap. Staffing is stretched too: five of the Coast Guard's six Civil Engineering Units named staffing their biggest challenge in managing environmental liabilities, with one official in Juneau, Alaska alone responsible for dozens of sites. Congress added $4.379 billion in July 2025 reconciliation funding for Coast Guard shore-facility construction -- work that will proceed without any corresponding increase in environmental-engineering staff to track what it uncovers.
Even the parts they do count keep growing
The Coast Guard spent more than $45 million on cleanup projects from fiscal 2022 through 2025 -- yet its estimated liability still grew by $57 million over the same stretch, as inflation and new discoveries outpaced the spending. In fiscal 2025 alone, the agency spent $10.4 million on cleanup, while inflation added more than $6 million back to the total. Thirty-seven projects have already blown past their original estimates, for $16.7 million in unanticipated costs since 2022 -- including a Plymouth, Massachusetts lighthouse originally budgeted at $439,000⧉ that needed $1.3 million more once crews found additional contaminated soil and buried historical artifacts. For roughly a quarter of its projects, the Coast Guard has only estimated the cost to study the site, not clean it up -- says that alone could mean tens of millions more once cleanup costs are finally calculated.
A management framework 12 steps under
measured the Coast Guard's program against its own 16-step framework for risk-informed environmental decision-making. The Coast Guard fully met just 4 of the 16 steps⧉, including never defining objectives or performance measures for a program its own policy requires -- meaning there's no formal way to tell whether the agency's cleanup efforts are actually working. This isn't the first time has flagged a related gap: a 2019 report recommended more detailed budget disclosure to Congress, a recommendation the Coast Guard still hadn't implemented as of May 2026, seven years later.
What GAO wants fixed
recommended the Coast Guard expand what it tells Congress -- naming cleanup projects it can't yet reasonably estimate and quantifying the uncertainty in the figures it does report -- and develop a long-term strategy for the program with defined objectives and outcome evaluation. The Department of Homeland Security agreed with both recommendations. As of this report, both remain open, with no timeline yet confirmed for closure.
The takeaway
- The number Congress sees is the floor, not the ceiling. $448 million is what's currently estimable -- contamination, partially studied sites, and routine scope creep all point toward a materially larger true number that isn't in any budget document yet.
- Spending on cleanup hasn't shrunk the liability -- it's barely kept pace. $45 million spent over four years still left the total $57 million higher, mostly because inflation and new discoveries outrun the pace of remediation.
- There's no scorecard for whether any of this is working. The Coast Guard has run this program for years without objectives or performance measures to evaluate it -- a gap 's own framework was built to catch, and one a similar 2019 recommendation didn't fix either.
The ~$415 million figure in this piece is this outlet's own illustrative estimate, built by applying the Defense Department's average per-site cleanup cost to the Coast Guard's 34 identified sites -- it is not a or Coast Guard figure, and explicitly cautions that Coast Guard and DoD sites likely differ in size and complexity. Nothing in the underlying report alleges wrongdoing, fraud, or mismanagement of specific cleanup dollars; 's own findings are about disclosure and program-management gaps, and the agency's staffing constraints and genuine -cleanup-technology uncertainty are part of why, not just a failure to try. This report was released the same day this piece was written; no independent news coverage or congressional reaction had emerged as of publication.
Sources(1) ▾
- U.S. Government Accountability Office, Environmental Liabilities: Coast Guard Should Give Congress More Information on Millions of Dollars in Potential Costs (GAO-26-108173) (2026-07-14) — A audit, requested by the House Transportation and Infrastructure Committee, of the Coast Guard's environmental liabilities for its $28 billion shore infrastructure portfolio, examining reporting gaps and risk-informed decision-making practices. Indexed via BlackLeaf Artemis (sealed) and separately fetched in full and converted with pdftotext -layout. files.gao.gov · original document
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The Coast Guard manages a $28 billion portfolio of boat stations, air stations, housing, and lighthouses -- many contaminated by decades of past practices. A GAO audit requested by the House Transportation and Infrastructure Committee⧉ found the agency reported about $448 million in environmental cleanup liabilities as of September 2025. What it hasn't told Congress: contamination from 'forever chemicals' at dozens of sites could add hundreds of millions more, and the agency has no long-term strategy or performance measures for managing any of it.