Lower Sangamon HUC8 07130008
A 2,311 km² sub-basin of the Upper Mississippi region in IL. Drought coverage is from the US Drought Monitor (map of 2026-09-01); 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 4 reporting
Median flow
166%
p57 of record
Water assets
1,004
0 springs · 806 wells
USGS gauges (4)
- SPRING CREEK AT SPRINGFIELD, IL055775000 cfsp29 · normal
- SANGAMON RIVER AT PETERSBURG, IL05578000286 cfsp54 · normal
- SANGAMON RIVER AT RIVERTON, IL05576500219 cfsp61 · normal
- SANGAMON RIVER NEAR OAKFORD, IL05583000946 cfsp69 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 0/4 | p57 |
Top water assets
- 66Prairie Lake Damreservoir
- 66Drake Lake Damreservoir
- 66Lake Petersburg Damreservoir
- 66Virginia Lake Damreservoir
- 65Buffalo Drive Damreservoir
- 65Schmidgall Dam 1reservoir
- 65Sangamon River At Petersburg, Ilriver
- 65Sangamon River Near Oakford, Ilriver
- 65Woodlake Estates Damreservoir
- 65Hickory Hills Lake Damreservoir