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Illinois · EPA ECHO (national)
CHESTER STP SSCS
Permit IL0072931
—
No waterway impact reported
Reported events
13
Total volume
105K gal
Reached waterways
0 (0%)
Reporting since
2024
What caused the overflows
Equipment Failure
7
Other / Unknown
3
Rainfall / Flooding
2
Grease / FOG
1
Reported overflow events (showing 13 of 13)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Mar 16, 2026 | 10 gal | Equipment Failure | — | — |
| Feb 23, 2026 | 200 gal | Other / Unknown | — | — |
| Jan 6, 2026 | 400 gal | Equipment Failure | — | mississippi river |
| Oct 31, 2025 | 200 gal | Equipment Failure | — | mississippi river |
| Oct 27, 2025 | 50 gal | Equipment Failure | — | mississippi river |
| Oct 22, 2025 | 80 gal | Equipment Failure | — | mississippi river |
| Sep 6, 2025 | 1K gal | Grease / FOG | — | — |
| Sep 2, 2025 | 20 gal | Other / Unknown | — | marys river maybe |
| Aug 18, 2025 | 5K gal | Equipment Failure | — | marts river |
| Jul 29, 2025 | 20K gal | Other / Unknown | — | unknown name creek to marys river |
| Apr 6, 2025 | 3K gal | Rainfall / Flooding | — | marys river |
| Mar 15, 2025 | 300 gal | Equipment Failure | — | mississippi river |
| Nov 4, 2024 | 75K gal | Rainfall / Flooding | — | — |
Source: EPA ECHO (national). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.