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County file — WI

Underground Storage Tanks in Winnebago County, WI — 717 facilities, 605 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Winnebago County, population 170,817.

717UST facilities
310tanks in service
1,738closed tanks
605leak records
13open cases
592no further action

Winnebago County has 717 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 310 tanks in service and 1,738 tanks that have been closed or removed. Over the life of the program, 605 fuel releases were reported here; 592 (98% of records) were investigated and closed with No Further Action, and 13 of those cleanup cases were still open when the snapshot was compiled.

That works out to 18.1 tanks in service per 10,000 residents, below 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 Winnebago County, WI?

The EPA UST Finder snapshot lists 717 registered UST facilities in Winnebago County with 310 tanks currently in service, 1,738 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Winnebago County?

605 releases from underground storage tanks are on record for Winnebago County. 592 (98%) reached No Further Action status, while 13 cleanup cases remained open in the snapshot.

How do I check a specific address in Winnebago County?

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