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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
41
Stressed
Drought index
349
Extreme
Area in D2+
98.47%
0% exceptional (D4)
Gauges below normal
64%
of 11 reporting
Median flow
51%
p10 of record
Water assets
1,713
14 springs · 487 wells
USGS gauges (12)
- OKANOGAN RIVER AT OROVILLE, WA12439500201 cfsp7 · much below normal
- OKANOGAN RIVER NEAR TONASKET, WA12445000498 cfsp7 · much below normal
- OKANOGAN RIVER AT MALOTT, WA12447200576 cfsp7 · much below normal
- ANTOINE CREEK AT US HWY 97 NEAR ELLISFORDE, WA124442901 cfsp8 · much below normal
- BONAPARTE CREEK AT TONASKET, WA124445501 cfsp9 · much below normal
- WEST FORK SALMON CREEK NEAR CONCONULLY, WA124464006 cfsp10 · much below normal
- NORTH FORK SALMON CREEK NEAR CONCONULLY, WA124461504 cfsp17 · below normal
- LOUP LOUP CREEK AT MALOTT, WA124472851 cfsp30 · normal
- OMAK CREEK NEAR OMAK, WA124459004 cfsp31 · normal
- JOHNSON CREEK NEAR RIVERSIDE, WA124455004 cfsp34 · normal
- SALMON CREEK ABOVE DIVERSION NEAR OKANOGAN, WA124469954 cfsp55 · normal
- NINEMILE CREEK AT EASTLAKE RD NEAR OROVILLE, WA124389050 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 349 | 98.47 | 7/11 | p10 |
| 2026-10-18 | 349 | 98.47 | 7/11 | p12 |
| 2026-10-17 | 349 | 98.47 | 7/11 | p15 |
| 2026-10-16 | 349 | 98.47 | 7/11 | p16 |
| 2026-10-15 | 349 | 98.47 | 7/11 | p17 |
| 2026-10-14 | 349 | 98.47 | 7/11 | p17 |
| 2026-10-13 | 349 | 98.47 | 7/11 | p18 |
| 2026-10-12 | 349 | 98.47 | 7/11 | p15 |
| 2026-10-11 | 349 | 98.47 | 7/11 | p15 |
| 2026-10-10 | 349 | 98.47 | 10/11 | p14 |
| 2026-10-09 | 349 | 98.47 | 9/11 | p10 |
| 2026-10-08 | 349 | 98.47 | 9/11 | p14 |
| 2026-10-07 | 349 | 98.47 | 9/11 | p14 |
| 2026-10-06 | 349 | 98.47 | 9/11 | p18 |
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