Snohomish HUC8 17110011
A 769 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
64
Moderate
Drought index
102
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
76%
p24 of record
Water assets
1,488
193 springs · 1,086 wells
USGS gauges (3)
- SNOHOMISH RIVER NEAR MONROE, WA121508001,460 cfsp19 · below normal
- PILCHUCK RIVER NEAR SNOHOMISH, WA1215530054 cfsp29 · normal
- SNOHOMISH RIVER AT SNOHOMISH, WA12155500no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 102 | 0 | 1/2 | p24 |
Top water assets
- 73Ir — Ce S1-*10823Alcwrisspring
- 73Ir — Ce S1-*20111Cwrisspring
- 66Ir — Ce S1-*11129Alcwrisspring
- 66Ir — Ce S1-*11903Cwrisspring
- 66Dm Ir — Ce S1-*08609Cwrisspring
- 66Ir — Ce S1-*10952Cwrisspring
- 66Ir — Ce S1-*06318Cwrisspring
- 66Ir — Ce S1-*04354Cwrisspring
- 66Fs — Ce S1-*02706Cwrisspring
- 66Ir — Ce S1-*10442Cwrisspring