Los Angeles HUC8 18070105
A 2,152 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
73
Moderate
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 5 reporting
Median flow
10397%
p100 of record
Water assets
746
7 springs · 556 wells
USGS gauges (5)
- ARROYO SECO NR PASADENA CA110980001 cfsp65 · normal
- RIO HONDO BL WHITTIER NARROWS DAM CA1110230086 cfsp77 · above normal
- LOS ANGELES R A SEPULVEDA DAM CA110924502,380 cfsp100 · much above normal
- RIO HONDO AB WHITTIER NARROWS DAM CA11101250224 cfsp100 · much above normal
- BIG TUJUNGA C BL HANSEN DAM CA110970000 cfsp100 · much above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 0/5 | p100 |
Top water assets
- 67Pacoima Washriver
- 67Pacoima Washriver
- 67Pacoima Washriver
- 67Mill Creekriver
- 67Gold Creekriver
- 67Alder Creekriver
- 67Ler San Fernandoreservoir
- 67Fox Creekriver
- 67Big Tujunga Creekriver
- 67Pacoima Washriver