Provisional Monthly Streamflow Network - Tabular Data: February 2025
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Long-term monthly flows for period of record (cfs) | ||||||||
| Station | Drainage area (sq. mi.) |
Years of record | Monthly mean flow (cfs) | Mean flow* | Median (50% exceedence) flow | 90% exceedence flow | 10% exceedence flow | USGS Station No. |
| Rock River at Rockton |
6,363 |
85 |
2,939 |
4,255 |
3,594 |
1,739 |
7,336 |
|
| Rock River near Joslin |
9,549 |
85 |
6,811 |
7,076 |
5,911 |
2,705 |
12,660 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
N/A |
1,155 |
909 |
434 |
2,317 |
|
| Green River near Geneseo |
1,003 |
88 |
N/A |
807 |
711 |
131 |
1,545 |
|
| Edwards River near New Boston |
445 |
90 |
N/A |
384 |
321 |
52 |
791 |
|
| Kankakee River at Momence |
2,294 |
110 |
N/A |
2,624 |
2,548 |
1,073 |
4,482 |
|
| Iroquois River near Chebanse |
2,091 |
101 |
N/A |
2,631 |
2,159 |
381 |
6,256 |
|
| Fox River at Dayton |
2,642 |
110 |
N/A |
2,195 |
1,940 |
618 |
4,020 |
|
| Vermilion River at Pontiac |
579 |
82 |
N/A |
551 |
427 |
47 |
1,401 |
|
| Spoon River at Seville |
1,636 |
110 |
313 |
1,464 |
1,336 |
241 |
2,936 |
|
| LaMoine River at Ripley |
1,293 |
103 |
N/A |
1,030 |
744 |
121 |
2,197 |
|
| Bear Creek near Marcelline |
349 |
80 |
N/A |
263 |
171 |
16 |
603 |
|
| Mackinaw River near Congerville |
767 |
80 |
35 |
684 |
540 |
64 |
1,616 |
|
| Salt Creek near Greenview |
1,804 |
83 |
324 |
1,738 |
1,371 |
260 |
4,359 |
|
| Sangamon River at Monticello |
550 |
114 |
N/A |
599 |
445 |
52 |
1,345 |
|
| So. Fork Sangamon near Rochester |
867 |
75 |
304 |
875 |
600 |
31 |
2,068 |
|
| Illinois River at Valley City |
26,743 |
86 |
9,366 |
25,655 |
23,995 |
8,753 |
48,910 |
|
| Macoupin Creek near Kane |
868 |
96 |
N/A |
745 |
460 |
39 |
1,752 |
|
| Vermilion River near Danville |
1,290 |
103 |
N/A |
1,524 |
1,099 |
229 |
3,308 |
|
| Kaskaskia River at Vandalia |
1,940 |
55 |
1,046 |
2,786 |
2,398 |
459 |
5,650 |
|
| Shoal Creek near Breese |
735 |
82 |
411 |
898 |
588 |
85 |
2,147 |
|
| Embarras River at Ste. Marie |
1,516 |
113 |
611 |
1,964 |
1,609 |
240 |
4,117 |
|
| Skillet Fork at Wayne City |
464 |
107 |
808 |
673 |
511 |
49 |
1,758 |
|
| Little Wabash below Clay City |
1,131 |
110 |
1,014 |
1,561 |
1,183 |
163 |
3,683 |
|
| Big Muddy at Plumfield |
794 |
54 |
1,656 |
1,064 |
1,068 |
198 |
2,048 |
|
| Cache River at Forman |
244 |
102 |
1,204 |
514 |
437 |
78 |
970 |
|
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Choose another month Station Numbers are linked to the U.S. Geological Survey, providing more information about each station. Notes: Much below normal flow = 90-100% chance of exceedence. Below normal flow = 70-90% chance of exceedence. Normal flow = 30-70% chance of exceedence. Above normal flow = 10-30% chance of exceedence. Much above normal flow = 0-10% chance of exceedence. * As reported in U.S. Geological Survey (USGS) Water Resources Data, Illinois, Water Year 2023. For best results when printing this page, change your layout to "Landscape". Streamflow Data |