Lake Washington HUC8 17110012
A 1,572 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
55
Moderate
Drought index
112
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
77%
of 13 reporting
Median flow
74%
p12 of record
Water assets
3,229
655 springs · 2,169 wells
USGS gauges (15)
- REX RIVER NEAR CEDAR FALLS, WA121155004 cfsp8 · much below normal
- CEDAR RIVER BELOW BEAR CREEK NEAR CEDAR FALLS, WA1211450014 cfsp8 · much below normal
- CEDAR RIVER AT CEDAR FALLS, WA1211650031 cfsp9 · much below normal
- CEDAR RIVER NEAR CEDAR FALLS, WA1211500024 cfsp9 · much below normal
- CEDAR RIVER BELOW DIVERSION NEAR LANDSBURG, WA1211760089 cfsp10 · below normal
- CEDAR RIVER AT POWERPLANT AT CEDAR FALLS, WA1211640036 cfsp12 · below normal
- TAYLOR CREEK NEAR SELLECK, WA1211700018 cfsp12 · below normal
- CEDAR RIVER NEAR LANDSBURG, WA12117500231 cfsp15 · below normal
- CEDAR RIVER AT RENTON, WA12119000129 cfsp20 · below normal
- ISSAQUAH CREEK NEAR MOUTH NEAR ISSAQUAH, WA1212160021 cfsp21 · below normal
- CANYON CREEK NEAR CEDAR FALLS, WA121161003 cfsp25 · normal
- ROCK CREEK AT HIGHWAY 516 NEAR RAVENSDALE, WA121184004 cfsp62 · normal
- ISSAQUAH CREEK NEAR HOBART, WA1212060011 cfsp64 · normal
- BOULDER CREEK NEAR CEDAR FALLS, WA121157000 cfsno long-term record
- ROCK CREEK BELOW WALSH LAKE NEAR LANDSBURG, WA121177006 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 112 | 0 | 10/13 | p12 |
Top water assets
- 76Ir — Ap S1-27607spring
- 76Dm Ir St — Cl S1-300248Clspring
- 76Ir — Cp G1-158498Classpring
- 76Dg — Ce S1-*12415Cwrisspring
- 76Mu — Ce S1-*02039Cwrisspring
- 76Ci — Ce S1-*02714Cwrisspring
- 76Mu — Ce S1-*03533Cwrisspring
- 73Ci Mi — Ce S1-*06450Cspring
- 73Fs — Pe S1-28457spring
- 73Ds Fs Ir — Ce S1-*02230Cwrisspring