UST Check → counties → Illinois → Williamson
Underground storage tanks & leak sites in Williamson 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.
211registered tank facilities
135open tanks
493closed tanks
149leak incidents on record
41cleanups still open
41 leak cleanups in
Williamson 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 |
|---|---|---|---|---|
| Pilot Travel Center #595 | Marion | 6 / 12 | Open UST(s) | IL7015146 |
| Southern F.S. Inc. | Marion | 5 / 0 | Open UST(s) | IL7044347 |
| Casey's General Store #3669 | Cambria | 5 / 0 | Open UST(s) | IL7046511 |
| Casey's General Stores, Inc. #3637 | Marion | 5 / 0 | Open UST(s) | IL7046469 |
| Carterville Moto Mart | Carterville | 5 / 0 | Open UST(s) | IL7011124 |
| ROC Convenience Store | Johnston City | 5 / 0 | Open UST(s) | IL7043788 |
| ROC One Stop | Marion | 4 / 4 | Open UST(s) | IL7010002 |
| Hucks #247 | Marion | 4 / 0 | Open UST(s) | IL7024451 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| ABP Properties, LLC | Marion | 2018-04-19 | Gasoline | IL1990555286_20180357 |
| ABP Properties, LLC | Cambria | 2018-03-22 | Gasoline Diesel FuelOil | IL1990105013_20180279 |
| Abel Investments, LLC | Carterville | 2018-02-16 | Gasoline | IL1990155053_20180163 |
| Bennett's Service Center | Marion | 2017-09-11 | UsedOil | IL1990555111_20170831 |
| Farm Fresh | Carterville | 2017-09-06 | Gasoline | IL1990155056_20170813 |
| J.D. Streett & Company, Inc. | Herrin | 2013-09-17 | Gasoline | IL1990400008_20131026 |
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 211 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 41 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