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 2026-10-13); 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 4 reporting
Median flow
92%
p44 of record
Water assets
1,004
0 springs · 806 wells
USGS gauges (4)
- SPRING CREEK AT SPRINGFIELD, IL055775000 cfsp25 · normal
- SANGAMON RIVER NEAR OAKFORD, IL05583000415 cfsp40 · normal
- SANGAMON RIVER AT RIVERTON, IL05576500109 cfsp47 · normal
- SANGAMON RIVER AT PETERSBURG, IL05578000167 cfsp51 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 0 | 0 | 0/4 | p44 |
| 2026-10-19 | 0 | 0 | 0/4 | p42 |
| 2026-10-18 | 0 | 0 | 0/4 | p45 |
| 2026-10-17 | 0 | 0 | 0/4 | p47 |
| 2026-10-16 | 0 | 0 | 0/4 | p46 |
| 2026-10-15 | 0 | 0 | 0/4 | p39 |
| 2026-10-14 | 0 | 0 | 0/4 | p44 |
| 2026-10-13 | 0 | 0 | 0/4 | p46 |
| 2026-10-12 | 0 | 0 | 0/4 | p45 |
| 2026-10-11 | 0 | 0 | 0/4 | p47 |
| 2026-10-10 | 0 | 0 | 0/4 | p48 |
| 2026-10-09 | 0 | 0 | 0/4 | p49 |
| 2026-10-08 | 0 | 0 | 0/4 | p49 |
| 2026-10-07 | 0 | 0 | 0/4 | p51 |
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