Newport Bay HUC8 18070204
A 503 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
70
Moderate
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
114%
p36 of record
Water assets
199
0 springs · 153 wells
USGS gauges (2)
- AGUA CHINON WASH A PORTOLA SPRINGS RD NR IRVINE CA110481750 cfsp10 · below normal
- BONITA C A IRVINE CA110486001 cfsp63 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-18 | 0 | 0 | 1/2 | p36 |
| 2026-10-17 | 0 | 0 | 1/2 | p26 |
| 2026-10-16 | 0 | 0 | 1/2 | p24 |
| 2026-10-15 | 0 | 0 | 1/2 | p30 |
| 2026-10-14 | 0 | 0 | 1/2 | p40 |
| 2026-10-13 | 0 | 0 | 1/2 | p48 |
| 2026-10-12 | 0 | 0 | 1/2 | p51 |
| 2026-10-11 | 0 | 0 | 1/2 | p43 |
| 2026-10-10 | 0 | 0 | 1/2 | p44 |
| 2026-10-09 | 0 | 0 | 1/2 | p44 |
| 2026-10-08 | 0 | 0 | 1/2 | p44 |
| 2026-10-07 | 0 | 0 | 1/2 | p41 |
| 2026-10-06 | 0 | 0 | 1/2 | p43 |
| 2026-10-05 | 0 | 0 | 1/2 | p44 |
Top water assets
- 65San Diego Creekriver
- 62San Diego Creekriver
- 55San Diego Creekriver
- 55Serrano Creekriver
- 55Sand Canyon Washriver
- 55Sand Canyon Washriver
- 55Agua Chinon Washriver
- 55Bonita C A Irvine Cariver
- 55Serrano Creekriver
- 54005S009W25D001Swell