Upper Stanislaus HUC8 18040010
A 3,100 km² sub-basin of the California region in CA. 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
68
Moderate
Drought index
88
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
248%
p45 of record
Water assets
1,655
2 springs · 382 wells
USGS gauges (2)
- BLACK C NR COPPEROPOLIS CA112996000 cfsp10 · below normal
- STANISLAUS R A RIPON CA11303000935 cfsp80 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-18 | 88 | 0 | 1/2 | p45 |
| 2026-10-17 | 88 | 0 | 1/2 | p47 |
| 2026-10-16 | 88 | 0 | 1/2 | p42 |
| 2026-10-15 | 88 | 0 | 1/2 | p25 |
| 2026-10-14 | 88 | 0 | 1/2 | p37 |
| 2026-10-13 | 88 | 0 | 1/2 | p46 |
| 2026-10-12 | 88 | 0 | 1/2 | p46 |
| 2026-10-11 | 88 | 0 | 1/2 | p46 |
| 2026-10-10 | 88 | 0 | 1/2 | p46 |
| 2026-10-09 | 88 | 0 | 1/2 | p46 |
| 2026-10-08 | 88 | 0 | 1/2 | p45 |
| 2026-10-07 | 88 | 0 | 1/2 | p46 |
| 2026-10-06 | 88 | 0 | 1/2 | p47 |
| 2026-10-05 | 88 | 0 | 1/2 | p45 |
Top water assets
- 69Summit Creekriver
- 69Deadman Creekriver
- 69Basin Creekriver
- 69South Fork Stanislaus Riverriver
- 69Basin Creekriver
- 69Clark Forkriver
- 69Wilderness Creekriver
- 69North Fork Stanislaus Riverriver
- 69Clark Forkriver
- 69Weiser Creekriver