UST Check → counties → Montana → Sheridan
Underground storage tanks & leak sites in Sheridan County, MT
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.
89registered tank facilities
24open tanks
159closed tanks
48leak incidents on record
4cleanups still open
4 leak cleanups in
Sheridan 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 |
|---|---|---|---|---|
| FARMERS UNION OIL CO PLENTYWOOD | PLENTYWOOD | 7 / 5 | Open UST(s) | MT4606801 |
| SHERIDAN COUNTY SHOP | PLENTYWOOD | 4 / 4 | Open UST(s) | MT4606279 |
| AUTO TECH SERVICES | PLENTYWOOD | 3 / 7 | Open UST(s) | MT4601524 |
| KUM AND GO STORE 808 | PLENTYWOOD | 3 / 2 | Open UST(s) | MT4605200 |
| JACKS SERVICE | RESERVE | 2 / 3 | Open UST(s) | MT4602103 |
| Jack's Service | Reserve | 2 / 3 | Open UST(s) | 2050013 |
| WELCOME STOP PLENTYWOOD, LLC | PLENTYWOOD | 2 / 0 | Open UST(s) | MT4612667 |
| MONTANA PIONEER MANOR INC | PLENTYWOOD | 1 / 0 | Open UST(s) | MT4610679 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| COMMUNITY OIL CO # 5029 | Reserve | 2014-07-26 | — | MT5029 |
| HERMAN OIL INC HOMESTEAD #4615 | Homestead | 2007-11-14 | — | MT4615 |
| HERMAN OIL INC MEDICINE LAKE #3319 | Medicine Lake | 1997-10-14 | — | MT3319 |
| FARMERS UNION #2891 | Outlook | 1996-03-29 | — | MT2891 |
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 89 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 4 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