Upper Columbia-Entiat HUC8 17020010
A 3,879 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
39
Stressed
Drought index
200
Severe
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 3 reporting
Median flow
62%
p9 of record
Water assets
1,036
15 springs · 390 wells
USGS gauges (3)
- MAD RIVER AT ARDENVOIR, WA1245289017 cfsp9 · much below normal
- ENTIAT RIVER NEAR ARDENVOIR, WA1245280053 cfsp9 · much below normal
- ENTIAT RIVER NEAR ENTIAT, WA1245299079 cfsp9 · much below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 200 | 0 | 3/3 | p9 |
| 2026-10-19 | 200 | 0 | 3/3 | p10 |
| 2026-10-18 | 200 | 0 | 3/3 | p10 |
| 2026-10-17 | 200 | 0 | 3/3 | p10 |
| 2026-10-16 | 200 | 0 | 3/3 | p11 |
| 2026-10-15 | 200 | 0 | 3/3 | p10 |
| 2026-10-14 | 200 | 0 | 3/3 | p12 |
| 2026-10-13 | 200 | 0 | 3/3 | p11 |
| 2026-10-12 | 200 | 0 | 3/3 | p14 |
| 2026-10-11 | 200 | 0 | 3/3 | p10 |
| 2026-10-10 | 200 | 0 | 3/3 | p10 |
| 2026-10-09 | 200 | 0 | 3/3 | p10 |
| 2026-10-08 | 200 | 0 | 3/3 | p11 |
| 2026-10-07 | 200 | 0 | 3/3 | p16 |
Top water assets
- 69Mad Riverriver
- 67Stemilt Creekriver
- 67Rocky Reachreservoir
- 67Tommy Creekriver
- 67Roaring Creekriver
- 67Entiat Riverriver
- 67Squilchuck Creekriver
- 67Upper Loop Reservoirreservoir
- 67Middle Creekriver
- 67Mad Riverriver