Lower American HUC8 18020111
A 758 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
73
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
87%
p38 of record
Water assets
484
2 springs · 434 wells
USGS gauges (2)
- AMERICAN R A FAIR OAKS CA114465001,440 cfsp38 · normal
- ARCADE C NR DEL PASO HEIGHTS CA114473600 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 100 | 0 | 0/1 | p38 |
| 2026-10-19 | 100 | 0 | 0/1 | p43 |
| 2026-10-18 | 100 | 0 | 0/1 | p44 |
| 2026-10-17 | 100 | 0 | 0/1 | p57 |
| 2026-10-16 | 100 | 0 | 0/1 | p56 |
| 2026-10-15 | 100 | 0 | 0/1 | p57 |
| 2026-10-14 | 100 | 0 | 0/1 | p56 |
| 2026-10-13 | 100 | 0 | 0/1 | p57 |
| 2026-10-12 | 100 | 0 | 0/1 | p57 |
| 2026-10-11 | 100 | 0 | 0/1 | p60 |
| 2026-10-10 | 100 | 0 | 0/1 | p58 |
| 2026-10-09 | 100 | 0 | 1/2 | p33 |
| 2026-10-08 | 100 | 0 | 1/2 | p32 |
| 2026-10-07 | 100 | 0 | 1/2 | p31 |
Top water assets
- 66Nimbus Damreservoir
- 65Arcade Creekriver
- 65American R A Fair Oaks Cariver
- 65Chicken Ranch Sloughriver
- 65Dry Creekriver
- 65Dry Creekriver
- 65Alder Creekriver
- 65Arcade C Nr Del Paso Heights Cariver
- 65Dry Creekriver
- 65American Riverriver