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County file — AZ

Underground Storage Tanks in Navajo County, AZ — 381 facilities, 383 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Navajo County, population 108,153.

381UST facilities
212tanks in service
874closed tanks
383leak records
69open cases
267no further action

Navajo County has 381 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 212 tanks in service and 874 tanks that have been closed or removed, plus 15 temporarily out of service. Over the life of the program, 383 fuel releases were reported here; 267 (70% of records) were investigated and closed with No Further Action, and 69 of those cleanup cases were still open when the snapshot was compiled.

That works out to 19.6 tanks in service per 10,000 residents, well above the Arizona average of 8.6 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 Navajo County, AZ?

The EPA UST Finder snapshot lists 381 registered UST facilities in Navajo County with 212 tanks currently in service, 874 closed or removed tanks, and 15 temporarily out of service.

How many fuel leaks have been reported in Navajo County?

383 releases from underground storage tanks are on record for Navajo County. 267 (70%) reached No Further Action status, while 69 cleanup cases remained open in the snapshot.

How do I check a specific address in Navajo County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Navajo 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 ADEQ UST Program.

Verify with the state

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

Nearby countys in Arizona

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