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County file — WA

Underground Storage Tanks in Cowlitz County, WA — 356 facilities, 58 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Cowlitz County, population 105,460.

356UST facilities
206tanks in service
797closed tanks
58leak records
55open cases
3no further action

Cowlitz County has 356 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 206 tanks in service and 797 tanks that have been closed or removed, plus 6 temporarily out of service. Over the life of the program, 58 fuel releases were reported here; 3 (5% of records) were investigated and closed with No Further Action, and 55 of those cleanup cases were still open when the snapshot was compiled.

That works out to 19.5 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 Cowlitz County, WA?

The EPA UST Finder snapshot lists 356 registered UST facilities in Cowlitz County with 206 tanks currently in service, 797 closed or removed tanks, and 6 temporarily out of service.

How many fuel leaks have been reported in Cowlitz County?

58 releases from underground storage tanks are on record for Cowlitz County. 3 (5%) reached No Further Action status, while 55 cleanup cases remained open in the snapshot.

How do I check a specific address in Cowlitz County?

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