UST Check → counties → Illinois → Cook
Underground storage tanks & leak sites in Cook County, IL
Every figure below is from EPA UST Finder — the EPA-compiled national registry of state-reported underground storage tanks — county aggregates as published by EPA.
7,547registered tank facilities
5,133open tanks
20,223closed tanks
9,809leak incidents on record
2,017cleanups still open
2,017 leak cleanups in
Cook County are still open — the state has not closed the case.
An open cleanup near a property you're buying or lending on is a findable, checkable fact: it appears in a
per-address screen with distance and the registry record.
Largest registered facilities
By open-tank count, from the facility-level registry. Every fact is attributed to the EPA record (linked ID); something wrong — use the correction path in the footer and we'll fix or remove it promptly.
| Facility | City | Open / closed tanks | Status | EPA record |
|---|---|---|---|---|
| Chicago Aerosol, LLC | Bridgeview | 44 / 48 | Open UST(s) | IL2001982 |
| Gold Eagle Co. | Chicago | 20 / 10 | Open UST(s) | IL2022334 |
| Sunnyside Corp. | Wheeling | 15 / 32 | Open UST(s) | IL2005135 |
| Rycoline Products Inc | Chicago | 13 / 15 | Open UST(s) | IL2013084 |
| Dow Chemical | Elk Grove Village | 13 / 14 | Open UST(s) | IL2015634 |
| Edward Hines Jr. Hospital | Hines | 13 / 11 | Open UST(s) | IL2019445 |
| Oak Forest Hospital | Oak Forest | 11 / 12 | Open UST(s) | IL2018522 |
| Williams Hayward Protective Coating | Bedford Park | 10 / 19 | Open UST(s) | IL2007202 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Synergy Creative, Inc. | Chicago | 2018-10-18 | — | IL316375139_20180989 |
| Evanston Gateway, LLC | Evanston | 2018-10-16 | Gasoline | IL310815382_20180972 |
| Meyer Steel Drum, Inc. | Chicago | 2018-10-12 | — | IL316300020_20180957 |
| Shell Oil Company | Prospect Heights | 2018-10-11 | Gasoline | IL312535028_20180955 |
| Commonwealth Edison | Chicago | 2018-10-10 | — | IL316005543_20180952 |
| Evirons Lincoln Holdings, LLC | Chicago | 2018-10-09 | FuelOil UsedOil | IL316075332_20180946 |
What this means if you're buying or lending here
- "Closed" ≠ clean. A closed tank was taken out of service per the registry — many were closed without soil testing, especially before the late 1990s.
- The registry is incomplete by design. Tanks removed before 1986 and most residential heating-oil tanks were never registered. A county with 7,547 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 2,017 cases in this county are still open; contamination may still be under investigation or remediation — distance from a specific parcel is what matters, and that's a per-address question.
Screen a specific property
This page covers the county. A purchase or loan decision needs the registry around one address: registered tanks at the parcel, every facility within 500 and 1,500 ft, leak cleanups with status and distance — each line cited to the official record.
Screen an address — $49 How it worksThis is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.
source: EPA UST Finder EPA data vintage 2024-12-04 computed 2026-06-12