Lower Illinois River Basin NAWQA
Areas covered include the Illinois River and tributaries from Ottawa, Illinois, to the confluence with the Mississippi at Grafton, Illinois.
NCRFC River Ice Statements
During the late fall, winter and early spring, the NCRFC issues weekly River Ice Statements pertaining to the channel conditions and ice coverage for Lock and Dams along the mainstems of the Mississippi River and Illinois River.
NWS-ILX Rivers and Hydrology
Offers Advanced Hydrologic Prediction Services (AHPS) for Illinois river and river basin areas, including tabular, graphic and flood stage data.