Little Sioux HUC8 10230003
A 7,318 km² sub-basin of the Missouri region in IA, MN. 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
70
Moderate
Drought index
185
Moderate
Area in D2+
4.21%
0% exceptional (D4)
Gauges below normal
0%
of 4 reporting
Median flow
61%
p30 of record
Water assets
4,264
0 springs · 2,072 wells
USGS gauges (4)
- Little Sioux River near Turin, IA06607500319 cfsp29 · normal
- Little Sioux River at Linn Grove, IA0660585092 cfsp29 · normal
- Ocheyedan River near Spencer, IA0660500026 cfsp31 · normal
- Little Sioux River at Correctionville, IA06606600143 cfsp32 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 185 | 4.21 | 0/4 | p30 |
Top water assets
- 65Lake Okabenareservoir
- 65Miller Creekriver
- 65Spring Creekriver
- 65Bitter Creekriver
- 65Little Sioux River At Correctionville, Iariver
- 65Little Sioux Riverriver
- 65West Fork Little Sioux Riverriver
- 65Willow Creekriver
- 65Little Sioux Riverriver
- 65Lake Bellareservoir