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County file — WA

Underground Storage Tanks in Walla Walla County, WA — 276 facilities, 16 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Walla Walla County, population 61,726.

276UST facilities
102tanks in service
629closed tanks
16leak records
16open cases
0no further action

Walla Walla County has 276 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 102 tanks in service and 629 tanks that have been closed or removed, plus 3 temporarily out of service. Over the life of the program, 16 fuel releases were reported here; 0 (0% of records) were investigated and closed with No Further Action, and 16 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 Washington 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 Walla Walla County, WA?

The EPA UST Finder snapshot lists 276 registered UST facilities in Walla Walla County with 102 tanks currently in service, 629 closed or removed tanks, and 3 temporarily out of service.

How many fuel leaks have been reported in Walla Walla County?

16 releases from underground storage tanks are on record for Walla Walla County. 0 (0%) reached No Further Action status, while 16 cleanup cases remained open in the snapshot.

How do I check a specific address in Walla Walla County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Walla Walla 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 WA Ecology UST Program.

Verify with the state

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

Nearby countys in Washington

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