UST Check → counties → Montana → Lewis and Clark
Underground storage tanks & leak sites in Lewis and Clark 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.
283registered tank facilities
140open tanks
603closed tanks
236leak incidents on record
52cleanups still open
52 leak cleanups in
Lewis and Clark 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 EAST HELENA | EAST HELENA | 7 / 0 | Open UST(s) | MT2508697 |
| TOWN PUMP OF EAST HELENA #2 | EAST HELENA | 7 / 0 | Open UST(s) | MT5613915 |
| MONROE'S HIGH COUNTRY TRAVEL PLAZA | HELENA | 6 / 6 | Open UST(s) | MT2508659 |
| TOWN PUMP INC HELENA 5 | HELENA | 6 / 0 | Open UST(s) | MT6015029 |
| TOWN PUMP INC HELENA 4 | HELENA | 6 / 0 | Open UST(s) | MT5613846 |
| TOWN PUMP INC HELENA 1 | HELENA | 5 / 3 | Open UST(s) | MT2508706 |
| TOWN PUMP INC HELENA #3 | HELENA | 5 / 0 | Open UST(s) | MT6015210 |
| MOUNTAIN VIEW COOP LINCOLN | LINCOLN | 4 / 3 | Open UST(s) | MT2503995 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| HELENA RAILYARD MRL #5054 | Helena | 2014-10-17 | — | MT5054 |
| TOWN PUMP INC HELENA 3 #4793 | Helena | 2010-08-09 | — | MT4793 |
| GUARANTEED MUFFLER SHOP #4729 | Helena | 2009-02-19 | — | MT4729 |
| CANYON FERRY MINI BASKET #4584 | East Helena | 2007-08-13 | — | MT4584 |
| GATES OF THE MOUNTAINS INC #4569 | Helena | 2007-04-11 | — | MT4569 |
| FORMER E Z STOP WEST #4412 | Helena | 2005-05-18 | — | MT4412 |
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 283 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 52 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