UST Check → counties → Illinois → Stephenson
Underground storage tanks & leak sites in Stephenson 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.
145registered tank facilities
92open tanks
309closed tanks
106leak incidents on record
30cleanups still open
30 leak cleanups in
Stephenson 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 |
|---|---|---|---|---|
| Bowen Oil Station | Pearl City | 5 / 0 | Open UST(s) | IL1022199 |
| Casey's General Store | Freeport | 5 / 0 | Open UST(s) | IL1046498 |
| Circle K# 1439 | Freeport | 5 / 0 | Open UST(s) | IL1000843 |
| Lena Fast Stop | Lena | 4 / 2 | Open UST(s) | IL1018404 |
| IL0110 | Freeport | 4 / 1 | Open UST(s) | IL1015644 |
| Freeport Fast Stop Express | Freeport | 4 / 0 | Open UST(s) | IL1027652 |
| Duncan Sales & Services | Rock City | 4 / 0 | Open UST(s) | IL1021295 |
| 1220 W. Galena | Freeport | 3 / 5 | Open UST(s) | IL1015017 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| LeHigh Gas Wholesale Services | Freeport | 2018-09-02 | Unleaded | IL1770205107_20180824 |
| Slater, Tom | German Valley | 2014-03-05 | Gasoline Diesel | IL1770255005_20140256 |
| Wirtjes, Harold | Freeport | 2012-08-15 | Gasoline | IL1770205240_20120850 |
| Johnson Oil Company | Freeport | 2011-04-13 | Gasoline | IL1770205226_20110330 |
| Kelley Williamson Company | Cedarville | 2011-02-23 | Gasoline | IL1770055002_20110163 |
| Anjum Petroleum | Freeport | 2011-02-14 | Gasoline Diesel | IL1770205058_20110125 |
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 145 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 30 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