UST Check → counties → Montana → Madison
Underground storage tanks & leak sites in Madison 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.
78registered tank facilities
35open tanks
153closed tanks
73leak incidents on record
14cleanups still open
14 leak cleanups in
Madison 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 |
|---|---|---|---|---|
| MCLEOD MERCANTILE SW CORNER | NORRIS | 7 / 1 | Open UST(s) | MT5614138 |
| TOWN PUMP INC ENNIS | ENNIS | 6 / 2 | Open UST(s) | MT2808698 |
| A M WELLES | SHERIDAN | 6 / 0 | Open UST(s) | MT6015002 |
| ROCKY MOUNTAIN SUPPLY INC ENNIS | ENNIS | 6 / 0 | Open UST(s) | MT5613826 |
| MCLEOD MERCANTILE 2802043 | SHERIDAN | 4 / 4 | Open UST(s) | MT2802043 |
| THREE RIVERS QUICK STOP | TWIN BRIDGES | 2 / 3 | Open UST(s) | MT2810708 |
| BOS CHEVRON AND TIRE SERVICE | TWIN BRIDGES | 2 / 2 | Open UST(s) | MT2807478 |
| WARREN MILLER LODGE | CAMERON | 1 / 1 | Open UST(s) | MT6015020 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| MCLEOD MERCANTILE SW CORNER #5254 | Norris | 2017-10-18 | — | MT5254 |
| MONTANA RAIL LINK #3963 | Harrison | 2000-08-01 | — | MT3963 |
| TEDS CAR WASH #3404 | Twin Bridges | 1998-03-25 | — | MT3404 |
| MADISON VALLEY ENTERPRISES #3257 | Ennis | 1997-08-28 | — | MT3257 |
| MADISON REALTY INC #2715 | Ennis | 1995-09-06 | — | MT2715 |
| MADISON REALTY INC #3097 | Ennis | 1995-09-06 | — | MT3097 |
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 78 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 14 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