Provisional Monthly Streamflow Network - Tabular Data: October 2022
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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 |
84 |
3,696 |
3,628 |
2,935 |
1,093 |
6,262 |
|
Rock River near Joslin |
9,549 |
84 |
5,724 |
5,179 |
4,210 |
1,665 |
8,879 |
|
Pecatonica River at Freeport |
1,326 |
109 |
726 |
810 |
650 |
313 |
1,480 |
|
Green River near Geneseo |
1,003 |
88 |
227 |
408 |
217 |
67 |
978 |
|
Edwards River near New Boston |
445 |
88 |
34 |
152 |
51 |
13 |
519 |
|
Kankakee River at Momence |
2,294 |
111 |
711 |
1,293 |
931 |
596 |
2,825 |
|
Iroquois River near Chebanse |
2,091 |
100 |
151 |
765 |
238 |
59 |
2,160 |
|
Fox River at Dayton |
2,642 |
109 |
785 |
1,268 |
902 |
321 |
2,774 |
|
Vermilion River at Pontiac |
579 |
81 |
15 |
175 |
30 |
3 |
637 |
|
Spoon River at Seville |
1,636 |
109 |
109 |
545 |
183 |
57 |
1,503 |
|
LaMoine River at Ripley |
1,293 |
103 |
48 |
445 |
115 |
23 |
1,584 |
|
Bear Creek near Marcelline |
349 |
80 |
10 |
128 |
14 |
1 |
516 |
|
Mackinaw River near Congerville |
767 |
79 |
8 |
218 |
30 |
7 |
915 |
|
Salt Creek near Greenview |
1,804 |
82 |
189 |
555 |
224 |
111 |
1,698 |
|
Sangamon River at Monticello |
550 |
114 |
8 |
179 |
36 |
7 |
600 |
|
So. Fork Sangamon near Rochester |
867 |
74 |
100 |
205 |
26 |
2 |
623 |
|
Illinois River at Valley City |
26,743 |
85 |
5,605 |
13,283 |
8,067 |
5,617 |
30,100 |
|
Macoupin Creek near Kane |
868 |
96 |
59 |
251 |
40 |
6 |
663 |
|
Vermilion River near Danville |
1,290 |
102 |
84 |
387 |
113 |
44 |
1,133 |
|
Kaskaskia River at Vandalia |
1,940 |
54 |
99 |
579 |
210 |
62 |
2,248 |
|
Shoal Creek near Breese |
735 |
81 |
106 |
189 |
47 |
10 |
716 |
|
Embarras River at Ste. Marie |
1,516 |
112 |
51 |
437 |
144 |
30 |
1,227 |
|
Skillet Fork at Wayne City |
464 |
106 |
1 |
108 |
12 |
0 |
379 |
|
Little Wabash below Clay City |
1,131 |
109 |
24 |
240 |
52 |
7 |
971 |
|
Big Muddy at Plumfield |
794 |
53 |
85 |
157 |
76 |
34 |
464 |
|
Cache River at Forman |
244 |
101 |
1 |
62 |
16 |
1 |
243 |
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 2021. For best results when printing this page, change your layout to "Landscape". Streamflow Data |