Upper Cosumnes HUC8 18040013
A 2,460 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
70
Moderate
Drought index
88
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
272%
p84 of record
Water assets
373
0 springs · 295 wells
USGS gauges (1)
- COSUMNES R A MICHIGAN BAR CA1133500060 cfsp84 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 88 | 0 | 0/1 | p84 |
| 2026-10-18 | 88 | 0 | 0/1 | p85 |
| 2026-10-17 | 88 | 0 | 0/1 | p82 |
| 2026-10-16 | 88 | 0 | 0/1 | p82 |
| 2026-10-15 | 88 | 0 | 0/1 | p84 |
| 2026-10-14 | 88 | 0 | 0/1 | p84 |
| 2026-10-13 | 88 | 0 | 0/1 | p84 |
| 2026-10-12 | 88 | 0 | 0/1 | p79 |
| 2026-10-11 | 88 | 0 | 0/1 | p85 |
| 2026-10-10 | 88 | 0 | 0/1 | p79 |
| 2026-10-09 | 88 | 0 | 0/1 | p84 |
| 2026-10-08 | 88 | 0 | 0/1 | p83 |
| 2026-10-07 | 88 | 0 | 0/1 | p85 |
| 2026-10-06 | 88 | 0 | 0/1 | p85 |
Top water assets
- 69Camp Creekriver
- 69Prothro Creekriver
- 69Camp Creekriver
- 67Sly Park Creekriver
- 67Scott Creekriver
- 67Salt Rock Creekriver
- 67Middle Fork Cosumnes Riverriver
- 67South Fork Cosumnes Riverriver
- 67Scott Creekriver
- 67Sopiago Creekriver