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County file — MD

Underground Storage Tanks in St. Mary's County, MD — 297 facilities, 323 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for St. Mary's County, population 116,032.

297UST facilities
162tanks in service
903closed tanks
323leak records
0open cases
323no further action

St. Mary's County has 297 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 162 tanks in service and 903 tanks that have been closed or removed, plus 4 temporarily out of service. Over the life of the program, 323 fuel releases were reported here; 323 (100% of records) were investigated and closed with No Further Action, and no cleanup cases remained open when the snapshot was compiled.

That works out to 14.0 tanks in service per 10,000 residents, above the Maryland average of 11.8 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 St. Mary's County, MD?

The EPA UST Finder snapshot lists 297 registered UST facilities in St. Mary's County with 162 tanks currently in service, 903 closed or removed tanks, and 4 temporarily out of service.

How many fuel leaks have been reported in St. Mary's County?

323 releases from underground storage tanks are on record for St. Mary's County. 323 (100%) reached No Further Action status, while 0 cleanup cases remained open in the snapshot.

How do I check a specific address in St. Mary's County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any St. Mary's 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 MDE Oil Control Program.

Verify with the state

The live regulatory record for any St. Mary's County facility or leak case is held by the MDE Oil Control Program. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Maryland

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