Okanogan HUC8 17020006
A 12,121 km² sub-basin of the Pacific Northwest region in CN, 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
50
Moderate
Drought index
349
Extreme
Area in D2+
98.47%
0% exceptional (D4)
Gauges below normal
36%
of 11 reporting
Median flow
62%
p28 of record
Water assets
1,713
14 springs · 487 wells
USGS gauges (12)
- BONAPARTE CREEK AT TONASKET, WA124445500 cfsp9 · much below normal
- WEST FORK SALMON CREEK NEAR CONCONULLY, WA124464005 cfsp9 · much below normal
- OKANOGAN RIVER NEAR TONASKET, WA12445000554 cfsp19 · below normal
- OKANOGAN RIVER AT MALOTT, WA12447200598 cfsp22 · below normal
- ANTOINE CREEK AT US HWY 97 NEAR ELLISFORDE, WA124442900 cfsp26 · normal
- OKANOGAN RIVER AT OROVILLE, WA12439500303 cfsp28 · normal
- SALMON CREEK ABOVE DIVERSION NEAR OKANOGAN, WA1244699549 cfsp30 · normal
- LOUP LOUP CREEK AT MALOTT, WA124472852 cfsp33 · normal
- JOHNSON CREEK NEAR RIVERSIDE, WA124455003 cfsp35 · normal
- NORTH FORK SALMON CREEK NEAR CONCONULLY, WA124461504 cfsp43 · normal
- OMAK CREEK NEAR OMAK, WA124459005 cfsp75 · normal
- NINEMILE CREEK AT EASTLAKE RD NEAR OROVILLE, WA124389050 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 349 | 98.47 | 4/11 | p28 |
Top water assets
- 67West Fork Salmon Creekriver
- 67Bonaparte Creekriver
- 67Bonaparte Creekriver
- 67Omak Creekriver
- 67Siwash Creekriver
- 67West Fork Salmon Creekriver
- 67Tunk Creekriver
- 67West Fork Salmon Creek Near Conconully, Wariver
- 67North Fork Salmon Creek Near Conconully, Wariver
- 67South Fork Salmon Creekriver