Mad-Redwood HUC8 18010102
A 3,684 km² sub-basin of the California region in CA. 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
71
Moderate
Drought index
182
Moderate
Area in D2+
6.69%
0% exceptional (D4)
Gauges below normal
20%
of 5 reporting
Median flow
101%
p45 of record
Water assets
1,555
2 springs · 74 wells
USGS gauges (5)
- MAD R AB RUTH RES NR FOREST GLEN CA114803900 cfsp10 · below normal
- REDWOOD C A ORICK CA1148250019 cfsp45 · normal
- LITTLE R NR TRINIDAD CA114812005 cfsp45 · normal
- MAD R NR ARCATA CA1148100044 cfsp58 · normal
- REDWOOD C NR BLUE LAKE CA114815005 cfsp63 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 182 | 6.69 | 1/5 | p45 |
Top water assets
- 67Mad Riverriver
- 67Mad Riverriver
- 67Pilot Creekriver
- 67Mad Riverriver
- 67R. W. Matthewsreservoir
- 67Mad R Ab Ruth Res Nr Forest Glen Cariver
- 67Mad Riverriver
- 67Boulder Creekriver
- 67Pilot Creekriver
- 67Lamb Creekriver