UST Check → counties → Montana → Sanders
Underground storage tanks & leak sites in Sanders 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.
116registered tank facilities
45open tanks
267closed tanks
89leak incidents on record
6cleanups still open
6 leak cleanups in
Sanders 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 |
|---|---|---|---|---|
| TOWN PUMP INC THOMPSON FALLS | THOMPSON FALLS | 7 / 3 | Open UST(s) | MT4508720 |
| COLYER OIL CO E RAILROAD | PLAINS | 4 / 6 | Open UST(s) | MT4501147 |
| CORNERSTONE CONVENIENCE LLC | HOT SPRINGS | 4 / 2 | Open UST(s) | MT4512871 |
| THOMPSON FALLS FEED AND FUEL LLC | THOMPSON FALLS | 4 / 0 | Open UST(s) | MT4502633 |
| TOWN PUMP INC PLAINS | PLAINS | 4 / 0 | Open UST(s) | MT4508716 |
| RONS EXPRESS PAY | THOMPSON FALLS | 4 / 0 | Open UST(s) | MT4513460 |
| AITKENS QUIK STOP INC TROUT CREEK | TROUT CREEK | 4 / 0 | Open UST(s) | MT5614146 |
| LONEPINE COUNTRY STORE | LONEPINE | 3 / 0 | Open UST(s) | MT4512786 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| FORMER PHILLIPS 66 STATION 40708 (MDOT) #3964 | Noxon | 2000-04-18 | — | MT3964 |
| PLAINS SERVICE CENTER INC #3393 | Plains | 1997-02-28 | — | MT3393 |
| SPRING STREET EXXON #2927 | Hot Springs | 1996-05-17 | — | MT2927 |
| REINERTSON GARAGE #2526 | Hot Springs | 1993-10-25 | — | MT2526 |
| HOT SPRINGS SCHOOL DIST 14 J #3297 | Hot Springs | 1991-06-25 | — | MT3297 |
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 116 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 6 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