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TankCheck / States / California

County file — CA

Underground Storage Tanks in Humboldt County, CA — 87 facilities, 628 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Humboldt County, population 138,972.

87UST facilities
229tanks in service
32closed tanks
628leak records
31open cases
591no further action

Humboldt County has 87 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 229 tanks in service and 32 tanks that have been closed or removed. Over the life of the program, 628 fuel releases were reported here; 591 (94% of records) were investigated and closed with No Further Action, and 31 of those cleanup cases were still open when the snapshot was compiled.

That works out to 16.5 tanks in service per 10,000 residents, well above 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 Humboldt County, CA?

The EPA UST Finder snapshot lists 87 registered UST facilities in Humboldt County with 229 tanks currently in service, 32 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Humboldt County?

628 releases from underground storage tanks are on record for Humboldt County. 591 (94%) reached No Further Action status, while 31 cleanup cases remained open in the snapshot.

How do I check a specific address in Humboldt County?

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