Maximum discharge along the river was observed at the Illinois River At Valley City with a streamflow rate of 44,400 cfs. However, the deepest point on the river is located at the Illinois River At Henry reporting a gauge stage of 17.72 ft. This river is monitored from 12 different streamgauging stations along the Illinois River, the highest being perched at an elevation of 1,202 ft, the Illinois River Near Kerby .

Streamflow conditions and seasonal statistics

Streamgauges reporting the most discharge on the Illinois River

Discharge comparison for the highest gauges over the past 10 days

Streamflow discharge range for this time of year