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County file — CA

Underground Storage Tanks in Contra Costa County, CA — 378 facilities, 903 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Contra Costa County, population 1,135,585.

378UST facilities
1,005tanks in service
0closed tanks
903leak records
59open cases
844no further action

Contra Costa County has 378 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 1,005 tanks in service and 0 tanks that have been closed or removed. Over the life of the program, 903 fuel releases were reported here; 844 (93% of records) were investigated and closed with No Further Action, and 59 of those cleanup cases were still open when the snapshot was compiled.

That works out to 8.9 tanks in service per 10,000 residents, below the California average of 9.5 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 Contra Costa County, CA?

The EPA UST Finder snapshot lists 378 registered UST facilities in Contra Costa County with 1,005 tanks currently in service, 0 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Contra Costa County?

903 releases from underground storage tanks are on record for Contra Costa County. 844 (93%) reached No Further Action status, while 59 cleanup cases remained open in the snapshot.

How do I check a specific address in Contra Costa County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Contra Costa 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 California SWRCB UST Program.

Verify with the state

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

Nearby countys in California

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