Duwamish HUC8 17110013
A 1,258 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
132
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
33%
of 9 reporting
Median flow
87%
p36 of record
Water assets
2,834
189 springs · 2,184 wells
USGS gauges (13)
- GREEN RIVER AT 200TH STREET AT KENT, WA12113344287 cfsp9 · much below normal
- SPRINGBROOK CREEK AT ORILLIA, WA121133461 cfsp12 · below normal
- NEWAUKUM CREEK NEAR BLACK DIAMOND, WA1210850013 cfsp21 · below normal
- MILL CREEK AT EARTHWORKS PARK AT KENT, WA121133471 cfsp27 · normal
- GREEN RIVER AT PURIFICATION PLANT NEAR PALMER, WA12106700149 cfsp36 · normal
- GREEN RIVER BELOW HOWARD A HANSON DAM, WA12105900258 cfsp44 · normal
- GREEN RIVER NEAR AUBURN, WA12113000306 cfsp51 · normal
- MILL CREEK NEAR MOUTH AT ORILLIA, WA121133492 cfsp55 · normal
- BIG SOOS CREEK ABOVE HATCHERY NEAR AUBURN, WA1211260034 cfsp59 · normal
- GREEN RIVER BELOW CRISP CREEK NR BLACK DIAMOND, WA12108800236 cfsno long-term record
- GREEN RIVER ABOVE S 277TH ST AT KENT, WA12113150289 cfsno long-term record
- GREEN RIVER BELOW MEEKER ST AT KENT, WA12113310295 cfsno long-term record
- DUWAMISH RIVER AT GOLF COURSE AT TUKWILA, WA1211339047 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 132 | 0 | 3/9 | p36 |
Top water assets
- 76Fs — Ce S1-22503Cwrisspring
- 76Fs — Ce S1-21122Cwrisspring
- 76Mi — Ce S1-*20279Cwrisspring
- 76Fs — Cl S1-000449Clspring
- 76Fs — Ce S1-*19055Cwrisspring
- 76Puget Sound Aquifer System — South King Countyaquifer
- 76Mu — Ce S1-00506Cspring
- 76Fs — Ch Cs1-22503Cwrisspring
- 73Fs — Ce S1-*07990Cwrisspring
- 73Fs Re — Ce S1-*08048Cwrisspring