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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
55
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
69%
of 13 reporting
Median flow
67%
p9 of record
Water assets
3,229
655 springs · 2,169 wells
USGS gauges (15)
- CANYON CREEK NEAR CEDAR FALLS, WA121161000 cfsp5 · much below normal
- REX RIVER NEAR CEDAR FALLS, WA121155007 cfsp7 · much below normal
- CEDAR RIVER BELOW BEAR CREEK NEAR CEDAR FALLS, WA1211450012 cfsp7 · much below normal
- ROCK CREEK AT HIGHWAY 516 NEAR RAVENSDALE, WA121184003 cfsp8 · much below normal
- CEDAR RIVER NEAR CEDAR FALLS, WA1211500022 cfsp8 · much below normal
- TAYLOR CREEK NEAR SELLECK, WA1211700016 cfsp9 · much below normal
- ISSAQUAH CREEK NEAR MOUTH NEAR ISSAQUAH, WA1212160025 cfsp9 · much below normal
- ISSAQUAH CREEK NEAR HOBART, WA1212060011 cfsp19 · below normal
- CEDAR RIVER BELOW DIVERSION NEAR LANDSBURG, WA12117600292 cfsp24 · below normal
- CEDAR RIVER AT POWERPLANT AT CEDAR FALLS, WA1211640040 cfsp26 · normal
- CEDAR RIVER AT RENTON, WA12119000327 cfsp34 · normal
- CEDAR RIVER NEAR LANDSBURG, WA12117500364 cfsp42 · normal
- CEDAR RIVER AT CEDAR FALLS, WA12116500197 cfsp55 · 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 |
|---|---|---|---|---|
| 2026-10-19 | 100 | 0 | 9/13 | p9 |
| 2026-10-18 | 100 | 0 | 8/13 | p15 |
| 2026-10-17 | 100 | 0 | 7/13 | p9 |
| 2026-10-16 | 100 | 0 | 8/13 | p10 |
| 2026-10-15 | 100 | 0 | 9/13 | p10 |
| 2026-10-14 | 100 | 0 | 9/13 | p13 |
| 2026-10-13 | 100 | 0 | 9/13 | p19 |
| 2026-10-12 | 100 | 0 | 6/13 | p25 |
| 2026-10-11 | 100 | 0 | 5/13 | p31 |
| 2026-10-10 | 100 | 0 | 5/13 | p29 |
| 2026-10-09 | 100 | 0 | 7/13 | p21 |
| 2026-10-08 | 100 | 0 | 7/13 | p18 |
| 2026-10-07 | 100 | 0 | 9/13 | p10 |
| 2026-10-06 | 100 | 0 | 8/13 | p16 |
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