UST Check → counties → Wyoming → Fremont
Underground storage tanks & leak sites in Fremont County, WY
Every figure below is from EPA UST Finder — the EPA-compiled national registry of state-reported underground storage tanks — county aggregates as published by EPA.
305registered tank facilities
101open tanks
679closed tanks
160leak incidents on record
31cleanups still open
31 leak cleanups in
Fremont County are still open — the state has not closed the case.
An open cleanup near a property you're buying or lending on is a findable, checkable fact: it appears in a
per-address screen with distance and the registry record.
Largest registered facilities
By open-tank count, from the facility-level registry. Every fact is attributed to the EPA record (linked ID); something wrong — use the correction path in the footer and we'll fix or remove it promptly.
| Facility | City | Open / closed tanks | Status | EPA record |
|---|---|---|---|---|
| Wind River Smoke Shop | Riverton | 4 / 0 | Open UST(s) | 6010041 |
| Crowheart Store | Crowheart | 0 / 7 | Closed UST(s) | 6010011 |
| Sacajawea Service | Fort Washakie | 0 / 5 | Closed UST(s) | 6010023 |
| Wyoming Indian Elementary School | Ethete | 0 / 4 | Closed UST(s) | 6010007 |
| St Michael's Mission | Fort Washakie | 0 / 4 | Closed UST(s) | 6010147 |
| Tribal Service & Repair (Texaco) | Fort Washakie | 0 / 3 | Closed UST(s) | 6010019 |
| Arapahoe Post Office & Exchange | Arapahoe | 0 / 3 | Closed UST(s) | 6010022 |
| Rezoride | Kinnear | 0 / 3 | Closed UST(s) | 6010050 |
What this means if you're buying or lending here
- "Closed" ≠ clean. A closed tank was taken out of service per the registry — many were closed without soil testing, especially before the late 1990s.
- The registry is incomplete by design. Tanks removed before 1986 and most residential heating-oil tanks were never registered. A county with 305 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 31 cases in this county are still open; contamination may still be under investigation or remediation — distance from a specific parcel is what matters, and that's a per-address question.
Screen a specific property
This page covers the county. A purchase or loan decision needs the registry around one address: registered tanks at the parcel, every facility within 500 and 1,500 ft, leak cleanups with status and distance — each line cited to the official record.
Screen an address — $49 How it worksThis is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.
source: EPA UST Finder EPA data vintage 2024-12-04 computed 2026-06-12