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County file — IL

Underground Storage Tanks in Cook County, IL — 7,547 facilities, 9,809 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Cook County, population 5,313,828.

7,547UST facilities
5,133tanks in service
20,223closed tanks
9,809leak records
2,017open cases
7,792no further action

Cook County has 7,547 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 5,133 tanks in service and 20,223 tanks that have been closed or removed. Over the life of the program, 9,809 fuel releases were reported here; 7,792 (79% of records) were investigated and closed with No Further Action, and 2,017 of those cleanup cases were still open when the snapshot was compiled.

That works out to 9.7 tanks in service per 10,000 residents, well below 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.

Check any address in Cook County

Paste an address to map every registered tank and reported leak within a mile — distances in feet, cleanup statuses, and an A–F screening grade. Free, no login.

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Frequently asked questions

How many underground storage tanks are in Cook County, IL?

The EPA UST Finder snapshot lists 7,547 registered UST facilities in Cook County with 5,133 tanks currently in service, 20,223 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Cook County?

9,809 releases from underground storage tanks are on record for Cook County. 7,792 (79%) reached No Further Action status, while 2,017 cleanup cases remained open in the snapshot.

How do I check a specific address in Cook County?

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

← All Illinois counts