Lower Columbia HUC8 17080006
A 1,756 km² sub-basin of the Pacific Northwest region in OR, WA. 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
82
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
1,226
7 springs · 32 wells
USGS gauges (0)
No active discharge gauges in this sub-basin.
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | — | — |
Top water assets
- 76Big Creek — Domesticspring
- 67South Fork Grays Riverriver
- 66Cullaby Lake — Supplemental Flood Harvestingspring
- 66Bear Creekreservoir
- 66Middlereservoir
- 66Ds Po — Ap S2-30106spring
- 65Youngs Riverriver
- 65Wallooskee Riverriver
- 65Marys Creekriver
- 65John Day Riverriver