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County file — MT

Underground Storage Tanks in Big Horn County, MT — 137 facilities, 112 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Big Horn County, population 13,203.

137UST facilities
78tanks in service
330closed tanks
112leak records
30open cases
58no further action

Big Horn County has 137 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 78 tanks in service and 330 tanks that have been closed or removed, plus 9 temporarily out of service. Over the life of the program, 112 fuel releases were reported here; 58 (52% of records) were investigated and closed with No Further Action, and 30 of those cleanup cases were still open when the snapshot was compiled.

That works out to 59.1 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 Big Horn County, MT?

The EPA UST Finder snapshot lists 137 registered UST facilities in Big Horn County with 78 tanks currently in service, 330 closed or removed tanks, and 9 temporarily out of service.

How many fuel leaks have been reported in Big Horn County?

112 releases from underground storage tanks are on record for Big Horn County. 58 (52%) reached No Further Action status, while 30 cleanup cases remained open in the snapshot.

How do I check a specific address in Big Horn County?

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