Colville HUC8 17020003
A 2,635 km² sub-basin of the Pacific Northwest region in 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
48
Stressed
Drought index
206
Severe
Area in D2+
5.87%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
68%
p25 of record
Water assets
1,873
0 springs · 1,173 wells
USGS gauges (1)
- COLVILLE RIVER AT KETTLE FALLS, WA1240900055 cfsp25 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 206 | 5.87 | 1/1 | p25 |
Top water assets
- 67South Fork Mill Creekriver
- 67Hartill Creekriver
- 67Mill Creekriver
- 67Krumm Creekriver
- 67South Fork Chewelah Creekriver
- 67Bayley Creekriver
- 67North Fork Chewelah Creekriver
- 67Cole Creekriver
- 67Aspen Creekriver
- 67South Fork Mill Creekriver