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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
64
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
58%
p35 of record
Water assets
484
2 springs · 434 wells
USGS gauges (2)
- ARCADE C NR DEL PASO HEIGHTS CA114473600 cfsp10 · below normal
- AMERICAN R A FAIR OAKS CA114465002,480 cfsp59 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 100 | 0 | 1/2 | p35 |
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