Suisun Bay HUC8 18050001
A 1,690 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
63
Moderate
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
0%
p10 of record
Water assets
252
0 springs · 113 wells
USGS gauges (3)
- SAN RAMON C A SAN RAMON CA111825000 cfsp10 · below normal
- SUISUN SLOUGH NR BENICIA CA11455740no readingno long-term record
- FIRST MALLARD BRANCH NR FAIRFIELD CA381142122015801-437 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 1/1 | p10 |
Top water assets
- 66Martinez Damreservoir
- 66Lake Madiganreservoir
- 66Lake Freyreservoir
- 65Mount Diablo Creekriver
- 65Suisun Creekriver
- 65Sycamore Creekriver
- 65North Bay Aqueductriver
- 65San Ramon Creekriver
- 65Kirker Creekriver
- 65Suisun Creekriver