Upper Sangamon HUC8 07130006
A 3,732 km² sub-basin of the Upper Mississippi region in IL. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
82
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 3 reporting
Median flow
162%
p51 of record
Water assets
3,497
0 springs · 3,329 wells
USGS gauges (3)
- SANGAMON RIVER AT ROUTE 48 AT DECATUR, IL0557354010 cfsp51 · normal
- SANGAMON RIVER AT FISHER, IL0557091013 cfsp51 · normal
- SANGAMON RIVER AT MONTICELLO, IL0557200043 cfsp56 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 0 | 0 | 0/3 | p51 |
| 2026-10-20 | 0 | 0 | 0/3 | p52 |
| 2026-10-19 | 0 | 0 | 0/3 | p54 |
| 2026-10-18 | 0 | 0 | 0/3 | p56 |
| 2026-10-17 | 0 | 0 | 0/3 | p59 |
| 2026-10-16 | 0 | 0 | 0/3 | p61 |
| 2026-10-15 | 0 | 0 | 0/3 | p71 |
| 2026-10-14 | 0 | 0 | 0/3 | p67 |
| 2026-10-13 | 0 | 0 | 0/3 | p69 |
| 2026-10-12 | 0 | 0 | 0/3 | p69 |
| 2026-10-11 | 0 | 0 | 0/3 | p77 |
| 2026-10-10 | 0 | 0 | 0/3 | p72 |
| 2026-10-09 | 0 | 0 | 0/3 | p73 |
| 2026-10-08 | 0 | 0 | 0/3 | p79 |
Top water assets
- 66Lake Decatur Damreservoir
- 65Conway Farm Subdivision Lake Damreservoir
- 65Clear Creekriver
- 65Clear Creekriver
- 65Faries Park Dredge Disposal Damreservoir
- 65Sangamon River At Monticello, Ilriver
- 65Sangamon River At Route 48 At Decatur, Ilriver
- 65Lake Of The Woods Damreservoir
- 65Sangamon River At Fisher, Ilriver
- 65Monroe Street Damreservoir