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County file — MT

Underground Storage Tanks in Yellowstone County, MT — 540 facilities, 472 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Yellowstone County, population 163,372.

540UST facilities
361tanks in service
1,261closed tanks
472leak records
151open cases
320no further action

Yellowstone County has 540 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 361 tanks in service and 1,261 tanks that have been closed or removed, plus 28 temporarily out of service. Over the life of the program, 472 fuel releases were reported here; 320 (68% of records) were investigated and closed with No Further Action, and 151 of those cleanup cases were still open when the snapshot was compiled.

That works out to 22.1 tanks in service per 10,000 residents, well below 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 Yellowstone County, MT?

The EPA UST Finder snapshot lists 540 registered UST facilities in Yellowstone County with 361 tanks currently in service, 1,261 closed or removed tanks, and 28 temporarily out of service.

How many fuel leaks have been reported in Yellowstone County?

472 releases from underground storage tanks are on record for Yellowstone County. 320 (68%) reached No Further Action status, while 151 cleanup cases remained open in the snapshot.

How do I check a specific address in Yellowstone County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Yellowstone 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 Yellowstone 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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