Whitewater HUC8 07140107
A 3,088 km² sub-basin of the Upper Mississippi region in MO. 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
73
Moderate
Drought index
181
Moderate
Area in D2+
0.68%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
81%
p34 of record
Water assets
2,809
4 springs · 1,014 wells
USGS gauges (1)
- Castor River at Zalma, MO0702100082 cfsp34 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 181 | 0.68 | 0/1 | p34 |
| 2026-10-20 | 181 | 0.68 | 0/1 | p35 |
| 2026-10-19 | 181 | 0.68 | 0/1 | p33 |
| 2026-10-18 | 181 | 0.68 | 0/1 | p34 |
| 2026-10-17 | 181 | 0.68 | 0/1 | p38 |
| 2026-10-16 | 181 | 0.68 | 0/1 | p38 |
| 2026-10-15 | 179 | 0 | 0/1 | p38 |
| 2026-10-14 | 179 | 0 | 0/1 | p34 |
| 2026-10-13 | 179 | 0 | 0/1 | p35 |
| 2026-10-12 | 179 | 0 | 0/1 | p37 |
| 2026-10-11 | 179 | 0 | 0/1 | p38 |
| 2026-10-10 | 179 | 0 | 0/1 | p39 |
| 2026-10-09 | 179 | 0 | 0/1 | p41 |
| 2026-10-08 | 180 | 0 | 0/1 | p39 |
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