Surprise Valley HUC8 18080001
A 2,348 km² sub-basin of the California region in CA, NV. 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
60
Moderate
Drought index
200
Severe
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
333
125 springs · 23 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 200 | 0 | — | — |
| 2026-10-19 | 200 | 0 | — | — |
| 2026-10-18 | 200 | 0 | — | — |
| 2026-10-17 | 200 | 0 | — | — |
| 2026-10-16 | 200 | 0 | — | — |
| 2026-10-15 | 200 | 0 | — | — |
| 2026-10-14 | 200 | 0 | — | — |
| 2026-10-13 | 200 | 0 | — | — |
| 2026-10-12 | 200 | 0 | — | — |
| 2026-10-11 | 200 | 0 | — | — |
| 2026-10-10 | 200 | 0 | — | — |
| 2026-10-09 | 200 | 0 | — | — |
| 2026-10-08 | 200 | 0 | — | — |
| 2026-10-07 | 200 | 0 | — | — |
Top water assets
- 78Sand Creekspring
- 78New Year Lakespring
- 76014 N45 E18 26C 1spring
- 76014 N38 E18 20Cb 1spring
- 76014 N45 E18 26Ccbb1spring
- 75Keno Creekspring
- 74Bull Creekspring
- 74Nevada Water Rightspring
- 74014 N42 E18 01Acbc1spring
- 74Nevada Water Rightspring