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County file — MT

Underground Storage Tanks in Stillwater County, MT — 51 facilities, 56 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Stillwater County, population 9,516.

51UST facilities
41tanks in service
113closed tanks
56leak records
16open cases
40no further action

Stillwater County has 51 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 41 tanks in service and 113 tanks that have been closed or removed. Over the life of the program, 56 fuel releases were reported here; 40 (71% of records) were investigated and closed with No Further Action, and 16 of those cleanup cases were still open when the snapshot was compiled.

That works out to 43.1 tanks in service per 10,000 residents, well above the Montana average of 30.9 per 10,000. Countywide numbers are context, not a verdict on any parcel — tank risk is hyper-local, falling off within a few hundred feet.

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Frequently asked questions

How many underground storage tanks are in Stillwater County, MT?

The EPA UST Finder snapshot lists 51 registered UST facilities in Stillwater County with 41 tanks currently in service, 113 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Stillwater County?

56 releases from underground storage tanks are on record for Stillwater County. 40 (71%) reached No Further Action status, while 16 cleanup cases remained open in the snapshot.

How do I check a specific address in Stillwater County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Stillwater County address to map every registered tank and reported leak within a mile, with distances in feet and an A–F screening grade. Verify current records with the Montana DEQ UST Program.

Verify with the state

The live regulatory record for any Stillwater County facility or leak case is held by the Montana DEQ UST Program. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Montana

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