For YNP-MAMMOTH HOT SPRINGS (PWSID WY5680092) — YELLOWSTONE NATIONAL PARK, WY · serving 2,600 people
We don't see UCMR 5 detections above the federal MCL on file for YNP-MAMMOTH HOT SPRINGS. 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
Settlement funds totaling more than $13.6B close to public water systems in sequence. Missing a deadline forfeits your system's share of that fund — permanently.
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) must submit Action Fund claim forms covering remediation and treatment costs.
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.
We'll send a 5-section PDF checklist tailored to your system — system ID, detection evidence, treatment costs, source attribution, and filing logistics. Plus weekly PFAS deadline alerts for your state.
Free. No spam. Unsubscribe anytime.
Print this page (or save as PDF from your browser) and bring it to your next operations or engineering meeting.
If you miss it: Forfeit supplemental allocation reserved for disadvantaged communities.