For MAMMOTH CAVE/CENTRAL SYSTEM (PWSID KY0310940) — CAVE CITY, KY · serving 5,000 people
We don't see UCMR 5 detections above the federal MCL on file for MAMMOTH CAVE/CENTRAL SYSTEM. Many systems still qualify under broader Phase 2 criteria or via state monitoring data not yet in our database. Review the deadlines below; the settlement administrator makes the final eligibility call.
PFAS compounds detected: 0 · Max PFOA: — ppt · Max PFOS: — ppt
The DuPont window ($1.185B) closed June 30 — that money is gone for systems that didn't file. The 3M Phase 2 Action Fund ($10.5–12.5B) closes July 31; the Special Needs Fund closes August 1. Missing a deadline forfeits your system's share — permanently.
Already filed — directly or through counsel? You're set; do not file again. Duplicate submissions can delay processing. If you're unsure which form is on file (the earlier registration/Phase 1 claim vs. the Phase 2 Action Fund claim), confirm with the settlement administrator.
Action Fund Claims
Due June 30, 2026 · Fund: $1.185B
Phase 2 water systems (those serving >3,300 people, or those that detected PFAS more recently) had until June 30 to submit Action Fund claim forms covering remediation and treatment costs. The window is closed — systems that did not file forfeited their share.
If you miss it: Forfeit your system's share of the DuPont/Chemours/Corteva treatment fund.
Open the claims portal →Treatment & remediation cost claims
Due July 31, 2026 · Fund: $10.5–12.5B
Public water systems with confirmed PFAS detections must file via the official PFAS Water Settlement portal. The fund is the largest PFAS settlement pool in U.S. history.
If you miss it: Forfeit your share of the 3M settlement and waive future direct-action rights against 3M for PFAS.
Open the claims portal →Applications for disadvantaged / under-resourced systems
Due August 1, 2026 · Fund: Discretionary
Supplemental fund for systems facing capacity, affordability, or technical barriers. Documentation burden is highest but eligibility is broader than the main funds.
A 5-section PDF checklist keyed to this system's detection profile — system ID, detection evidence, treatment costs, source attribution, filing logistics. The 3M Phase 2 Action Fund ($10.5–12.5B) closes July 31; a documentation gap found now is fixable, one found in August isn't. Plus weekly PFAS deadline alerts for your state.
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Print this page or save it as a PDF. Don't hold it for the next scheduled ops meeting — the 3M filing window closes July 31, and section 3 (treatment costs) is the one that takes longest to pull together.
If you miss it: Forfeit supplemental allocation reserved for disadvantaged communities.
Public comment period closes
Due July 20, 2026 · Fund: —
EPA's proposed rescission of the PFHxS, PFNA, GenX, and PFBS MCLs (docket EPA-HQ-OW-2025-0654) is open for public comment through July 20. Water systems can put their monitoring and cost data on the record before the rule is finalized.
If you miss it: The docket closes without your system's operating data on the record.
Open the claims portal →Public comments on the consent decree close
Due July 24, 2026 · Fund: $450M
The $450M EPA/DOJ federal consent decree with Chemours — covering Chambers Works NJ, Parlin NJ, Fayetteville Works NC, and Washington Works WV — is open for public comment through July 24, before court approval.
If you miss it: Lose the chance to weigh in before the court approves the decree.
Open the claims portal →