Sumas River HUC8 17110001
A 1,622 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
49
Stressed
Drought index
271
Severe
Area in D2+
70.81%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
928
141 springs · 333 wells
USGS gauges (1)
- SUMAS RIVER NEAR SUMAS, WA122145009 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 271 | 70.81 | — | — |
| 2026-10-19 | 271 | 70.81 | — | — |
| 2026-10-18 | 271 | 70.81 | — | — |
| 2026-10-17 | 271 | 70.81 | — | — |
| 2026-10-16 | 271 | 70.81 | — | — |
| 2026-10-15 | 271 | 70.81 | — | — |
| 2026-10-14 | 271 | 70.81 | — | — |
| 2026-10-13 | 271 | 70.81 | — | — |
| 2026-10-12 | 271 | 70.81 | — | — |
| 2026-10-11 | 271 | 70.81 | — | — |
| 2026-10-10 | 271 | 70.81 | — | — |
| 2026-10-09 | 271 | 70.81 | — | — |
| 2026-10-08 | 271 | 70.81 | — | — |
| 2026-10-07 | 271 | 70.81 | — | — |
Top water assets
- 76Ir — Ap S1-27696spring
- 73Ir — Ap S1-27981spring
- 73Ds Po St — Ce S1-*03351Cwrisspring
- 69Depot Creekriver
- 67Quartz Creekriver
- 67Bear Creekriver
- 67Middle Fork Silesia Creekriver
- 67Indian Creekriver
- 67Silesia Creekriver
- 67Middle Fork Silesia Creekriver