| River | Level |
|---|---|
| Chicago River | 583.15 ft |
| Des Plaines River | 579.10 ft |
| Fox River | 576.60 ft |
| Calumet River | 579.85 ft |
| St. Joseph River | 576.95 ft |
| Kankakee River | 579.70 ft |
| Iroquois River | 580.15 ft |
Additional Information:
- The Chicago River is the only river in the United States that flows backwards.
- The Des Plaines River is the largest tributary of the Illinois River.
- The Fox River is the longest river in Illinois.
- The Calumet River is a major shipping route for the Chicago area.
- The St. Joseph River is the only river in Michigan that flows into Lake Michigan.
- The Kankakee River is the only river in Indiana that flows into the Illinois River.
- The Iroquois River is a tributary of the Kankakee River.