Illinois Rivers Shown on the Map: Big Muddy River, Des Plaines River, Edwards River, Embarras River, Fox River, Green River, Illinois River, Kankakee River, Kaskaskia River, Little Wabash River, Mackinaw River, Mississippi River, Ohio River, Rock River, Sangamon River, Spoon River and Wabas River.
Illinois Lakes Shown on the Map: Carlyle Reservoir, Crab Orchard Lake, Lake Shelbyville, Lake Springfield, Rend Lake, Senachwine Lake and Upper Peoria Lake.
Illinois Stream and River Levels
The United States Geological Survey has a number of stream gages located throughout Illinois. These estimate stream levels, discharges and record them over time. This data is published on the web and many stations allow users to plot custom graphs. Get updated Illinois river and stream levels from USGS here.
Illinois Stream and River Level Alerts
The United States Geological Survey has a system that will send you an email message when flood levels are reached on any steam with USGS gaging equipment that you have selected. Sign up here to recieve Illinois stream and river level alerts.
Illinois Drought Map
The United States Geological Survey publishes updated drought maps on their website. There you can view a map that shows where below normal 7-day average stream flow conditions were recently recorded. The maps are updated daily. Get a current Illinois drought map here.
Illinois Water Publications
The United States Geological Survey has a number of publications related to water use and water resources in Illinois. Visit the Central Midwest Water Science Center here.
Illinois Elevation Map
The topography of an area determines the direction of stream flow and often is a primary influence on the geographic distribution of precipitation. View a detailed Illinois elevation map.