Total streamflow across the Iroquois River was last observed at 14,266 cfs, and is expected to yield approximately 28,296 acre-ft of water today; about 143% of normal. River levels are high. Average streamflow for this time of year is 9,996 cfs, with recent peaks last observed on 2023-03-06 when daily discharge volume was observed at 20,550 cfs.

Maximum discharge along the river is currently at the Iroquois River Near Chebanse reporting a streamflow rate of 9,030 cfs. However, the streamgauge with the highest stage along the river is the Iroquois River At Iroquois with a gauge stage of 17.41 ft. This river is monitored from 4 different streamgauging stations along the Iroquois River, the highest being situated at an altitude of 656 ft, the Iroquois River At Rensselaer.