Harney-Malheur Lakes HUC8 17120001
A 3,762 km² sub-basin of the Pacific Northwest region in OR. 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
44
Stressed
Drought index
307
Extreme
Area in D2+
91.22%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
436
124 springs · 183 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 307 | 91.22 | — | — |
Top water assets
- 78West Fork Silvies River — Irrigationspring
- 76Malheur Lake — Supplemental Irrigationspring
- 76Lwr Sizemore Spring — Irrigationspring
- 76Poison Creek — Irrigationspring
- 76Poison Creek — Irrigationspring
- 76West Fork Silvies River — Irrigationspring
- 76Malheur Lake — Supplemental Irrigationspring
- 76East Fork Silvies River — Irrigationspring
- 76West Fork Silvies River — Irrigationspring
- 76Upr Sizemore Spring — Irrigationspring