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County file — IL

Underground Storage Tanks in Winnebago County, IL — 884 facilities, 499 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Winnebago County, population 291,406.

884UST facilities
566tanks in service
2,062closed tanks
499leak records
89open cases
410no further action

Winnebago County has 884 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 566 tanks in service and 2,062 tanks that have been closed or removed. Over the life of the program, 499 fuel releases were reported here; 410 (82% of records) were investigated and closed with No Further Action, and 89 of those cleanup cases were still open when the snapshot was compiled.

That works out to 19.4 tanks in service per 10,000 residents, well above the Illinois average of 13.7 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, IL?

The EPA UST Finder snapshot lists 884 registered UST facilities in Winnebago County with 566 tanks currently in service, 2,062 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Winnebago County?

499 releases from underground storage tanks are on record for Winnebago County. 410 (82%) reached No Further Action status, while 89 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 Illinois EPA LUST Program / OSFM.

Verify with the state

The live regulatory record for any Winnebago County facility or leak case is held by the Illinois EPA LUST Program / OSFM. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Illinois

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