San Diego HUC8 18070304
A 4,022 km² sub-basin of the California region in CA, MX. 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
67
Moderate
Drought index
61
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 10 reporting
Median flow
153%
p18 of record
Water assets
986
24 springs · 647 wells
USGS gauges (12)
- SWEETWATER R NR DESCANSO CA110150000 cfsp10 · below normal
- SWEETWATER R A DEHESA CA110162000 cfsp10 · below normal
- SANTA YSABEL C NR RAMONA CA110255000 cfsp10 · below normal
- GUEJITO C NR SAN PASQUAL CA110270000 cfsp10 · below normal
- SANTA MARIA C NR RAMONA CA110285000 cfsp10 · below normal
- LOS COCHES C NR LAKESIDE CA110222000 cfsp25 · normal
- SAN DIEGO R A MAST RD NR SANTEE CA110224800 cfsp52 · normal
- SAN DIEGO R A FASHION VALLEY AT SAN DIEGO CA110230002 cfsp69 · normal
- JAMUL C NR JAMUL CA1101400010 cfsp72 · normal
- LOS PENASQUITOS C NR POWAY CA110233402 cfsp75 · above normal
- ALVARADO C NR LA MESA CA110228301 cfsno long-term record
- TECOLOTE C AB FOOTBRIDGE NR SAN DIEGO CA110231000 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 61 | 0 | 5/10 | p18 |
Top water assets
- 67Bailey Creekriver
- 67Santa Ysabel Creekriver
- 67Bloomdale Creekriver
- 67Murrayreservoir
- 67Conejos Creekriver
- 67Harper Creekriver
- 67Sweetwater Riverriver
- 67Descanso Creekriver
- 67El Capitanreservoir
- 67Sweetwater Riverriver