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Illinois · EPA ECHO (national)

ALTON STP, CITY OF SSCS

Permit IL0027464

—
No waterway impact reported
Reported events
27
Total volume
7.8M gal
Reached waterways
0 (0%)
Reporting since
2024

What caused the overflows

Rainfall / Flooding
22
Equipment Failure
4
Other / Unknown
1

Reported overflow events (showing 27 of 27)

DateVolumeCauseReached waterReceiving water
Jun 21, 202650 galOther / Unknown—To storm drain then to Mississippi River
Jul 21, 202530K galRainfall / Flooding—Storm drain then to Mississippi River
Jun 9, 2025263K galEquipment Failure—Mississippi River
Jun 5, 2025242K galEquipment Failure—Mississippi River
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 202550K galRainfall / Flooding—Storm drain then to Mississippi River
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 20257.2M galRainfall / Flooding—Mississippi River
Apr 4, 2025500 galRainfall / Flooding——
Apr 4, 2025500 galRainfall / Flooding——
Feb 15, 202590 galEquipment Failure——
Feb 14, 2025100 galEquipment Failure——
Nov 5, 20242K galRainfall / Flooding——
Nov 4, 2024500 galRainfall / Flooding——
Nov 4, 2024100 galRainfall / Flooding——
Nov 4, 202450 galRainfall / Flooding——
Nov 4, 2024200 galRainfall / Flooding——
Nov 4, 202450 galRainfall / Flooding——
Nov 4, 20246K galRainfall / Flooding——
Nov 4, 2024100 galRainfall / Flooding——
Nov 4, 20241K galRainfall / Flooding——
Nov 4, 20243K galRainfall / Flooding——
Nov 4, 20244K galRainfall / Flooding——
Nov 4, 2024500 galRainfall / Flooding——

Source: EPA ECHO (national). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.