UST Check → counties → Montana → Blaine
Underground storage tanks & leak sites in Blaine 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.
66registered tank facilities
32open tanks
124closed tanks
48leak incidents on record
16cleanups still open
16 leak cleanups in
Blaine 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 |
|---|---|---|---|---|
| CHS BIG SKY CHINOOK | CHINOOK | 7 / 10 | Open UST(s) | MT310274 |
| TOWN PUMP INC CHINOOK FOOD STORE | CHINOOK | 6 / 5 | Open UST(s) | MT308688 |
| EZZIES WHOLESALE INC CHINOOK | CHINOOK | 6 / 0 | Open UST(s) | MT307801 |
| E Z MART | HARLEM | 5 / 3 | Open UST(s) | MT305982 |
| FORT BELKNAP KWIKSTOP | HARLEM | 4 / 0 | Open UST(s) | MT309729 |
| Little River Trading Post | Harlem | 4 / 0 | Open UST(s) | 2040005 |
| TOWN PUMP INC CHINOOK | CHINOOK | 0 / 10 | Closed UST(s) | MT306221 |
| Valley Grocery #2 (Abandoned) | Hays | 0 / 6 | Closed UST(s) | 2040001 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Valley Grocery #2 (Abandoned) | Hays | 2021-10-25 | Diesel | October 2021 Release |
| INMAN PROPERTY #4887 | Chinook | 2011-12-12 | — | MT4887 |
| FORMER BROWN'S VALLEY GROCERY #4802 | Harlem | 2010-10-15 | — | MT4802 |
| FORMER SCOTTS AUTO BODY #4486 | Chinook | 2006-04-18 | — | MT4486 |
| ANDYS EXXON #4252 | Chinook | 2003-07-21 | — | MT4252 |
| EZZIES WHOLESALE TANK FARM #4020 | Turner | 2001-04-12 | — | MT4020 |
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 66 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 16 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