Total streamflow across the Kaskaskia River was last observed at 40,374 cfs, and is expected to yield approximately 80,081 acre-ft of water today; about 129% of normal. River levels are high. Average streamflow for this time of year is 31,318 cfs, with recent peaks last observed on 2015-12-30 when daily discharge volume was observed at 129,500 cfs.

Maximum discharge along the river is currently at the Kaskaskia River At New Athens reporting a streamflow rate of 14,800 cfs. This is also the highest stage along the Kaskaskia River, with a gauge stage of 75.02 ft at this location. This river is monitored from 8 different streamgauging stations along the Kaskaskia River, the highest being situated at an altitude of 650 ft, the Kaskaskia River At Chesterville.

The Kaskaskia River flows for a length of 325 miles through central and southern Illinois before joining the Mississippi River. The river is known for its role in early French exploration and settlement in the area. It has a drainage area of 5,746 square miles and is heavily utilized for agricultural purposes. The Kaskaskia River is also home to several reservoirs and dams, including Carlyle Lake, which is the largest man-made lake in Illinois with a surface area of 26,000 acres. The lake is utilized for recreational activities such as boating, fishing, and camping. The river also provides water for municipal, industrial, and agricultural use. The Kaskaskia River has played a significant role in the history and development of Illinois and remains an important natural resource for the state.