St. Clair County contains 154 EPA-regulated facilities, 18 of which are currently flagged for significant noncompliance. The county also hosts 3 Superfund sites and 22 TRI chemical reporters. EPA has assessed $6.0M in lifetime penalties and TRI reporters disclosed roughly 72.1k lb of on-site releases. That facility count is well above the Illinois state average of 61 per county.
| Site | City | Status |
|---|---|---|
| Sauget Area 2 | Sauget | Cleanup underway |
| Sauget Area 1 | Sauget | Proposed for NPL |
| Old American Zinc Plant | Fairmont City | Listed on NPL |
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Afton Chemical Corporation | Sauget | 53.5k | Penalties |
| Occidental Chemical Corp Sauget Plant | Sauget | 6.6k | Compliant |
| Allnex Usa Inc. - East St. Louis Plant | East St. Louis | 6.5k | Compliant |
| Kempen Paint Co | East Carondelet | 2.3k | Compliant |
| Solvay Fluorides Llc | East St Louis | 1.9k | Compliant |
| Veolia Es Technical Solutions Llc | Sauget | 1.4k | Compliant |
| Petra Industries Inc | Fairmont City | 18 | Compliant |
| Kettler Casting Co Inc | Belleville | 10 | Compliant |
| Solutia Inc Krummrich Il (Part) | Sauget | 2 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Memorial Hospital | Belleville | $195.9k | 2023-05-16 |
| Idot-District 8 Bowman Pump Station | East Saint Louis | $0 | 2016-12-08 |
| Belleville Wastewater Treatment Facility | Belleville | $0 | 2025-03-25 |
| Sauget, Village Of | Sauget | $0 | 2021-12-15 |
| East St Louis Combined Sewer, City Of | East Saint Louis | $0 | 2025-07-17 |
| Canteen Township | Washington Park | $0 | 2021-04-07 |
| Swansea, Village Of | Swansea | $0 | 2018-11-14 |
| Dupo, Village Of | Dupo | $0 | 2023-01-11 |
| Cerro Flow Products Llc | Sauget | $0 | 2023-11-15 |
| St Clair, County Of | Belleville | $0 | 2021-04-29 |
| Union Pacific Rr Dupo Facility | Dupo | $0 | 2017-02-03 |
| Mound Pwd-Tp 01-Treatment Plant | Collinsville | $0 | |
| Justin Turner Private Sewage Dispoal System | Lebanon | $0 | |
| Rodney Olive Private Sewage Disposal System | Mascoutah | $0 | |
| Caseyville Township | O Fallon | $0 | 2021-12-03 |
| New Athens Stp, Village Of | New Athens | $0 | 2025-02-25 |
| Centreville, City Of | Centreville | $0 | |
| Centreville Township | Alorton | $0 |