RIVER GAUGE · ILLINOIS RIVER
Illinois River at Marseilles
La Salle County, Illinois
Water level11.22 ft
Flow3,970 cfs
Last readingSep 16, 2026, 4:45 PM UTC (last recorded)
Action17 ft
The past week
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What floods at each level
- 25 ft
Residences are threatened near the river in Marseilles.
- 17 ft
Water overflows low-lying banks just south of the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jan 20, 1916 | 35.4 ft | 40,000 cfs |
| May 18, 2020 | 28.32 ft | 106,000 cfs |
| Apr 18, 2013 | 28.27 ft | 104,000 cfs |
When the water runs low
- 10.5
Low water levels begin to impact shipping interests along the river.
More on Illinois River
Illinois River at Beardstown
Illinois River at Dresden Lock (tailwater)
Illinois River at Hardin
Illinois River near Havana
Illinois River near Henry
Illinois River near La Salle
Illinois River at Marseilles Lock (tailwater)
Illinois River at Morris
Illinois River at Meredosia
Illinois River at LaGrange Lock and Dam
Get an alert when Illinois River rises
Save this gauge in the free StormCast app and pick the level that matters to you. Your phone goes off when the water gets there.
