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County file — WI

Underground Storage Tanks in Washington County, WI — 566 facilities, 359 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Washington County, population 135,837.

566UST facilities
284tanks in service
1,186closed tanks
359leak records
12open cases
347no further action

Washington County has 566 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 284 tanks in service and 1,186 tanks that have been closed or removed, plus 2 temporarily out of service. Over the life of the program, 359 fuel releases were reported here; 347 (97% of records) were investigated and closed with No Further Action, and 12 of those cleanup cases were still open when the snapshot was compiled.

That works out to 20.9 tanks in service per 10,000 residents, about equal to the Wisconsin average of 20.7 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 Washington County, WI?

The EPA UST Finder snapshot lists 566 registered UST facilities in Washington County with 284 tanks currently in service, 1,186 closed or removed tanks, and 2 temporarily out of service.

How many fuel leaks have been reported in Washington County?

359 releases from underground storage tanks are on record for Washington County. 347 (97%) reached No Further Action status, while 12 cleanup cases remained open in the snapshot.

How do I check a specific address in Washington County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Washington 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 Wisconsin DATCP Storage Tanks.

Verify with the state

The live regulatory record for any Washington County facility or leak case is held by the Wisconsin DATCP Storage Tanks. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Wisconsin

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