Big Chino-Williamson Valley HUC8 15060201
A 5,578 km² sub-basin of the Lower Colorado region in AZ. 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
57
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 1 reporting
Median flow
0%
p10 of record
Water assets
1,576
33 springs · 548 wells
USGS gauges (1)
- WILLIAMSON VALLEY WASH NEAR PAULDEN, AZ095028000 cfsp10 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 100 | 0 | 1/1 | p10 |
| 2026-10-20 | 100 | 0 | 1/1 | p10 |
| 2026-10-19 | 100 | 0 | 1/1 | p10 |
| 2026-10-18 | 100 | 0 | 1/1 | p10 |
| 2026-10-17 | 100 | 0 | 1/1 | p10 |
| 2026-10-16 | 100 | 0 | 1/1 | p10 |
| 2026-10-15 | 101 | 0 | 1/1 | p10 |
| 2026-10-14 | 101 | 0 | 1/1 | p10 |
| 2026-10-13 | 101 | 0 | 1/1 | p10 |
| 2026-10-12 | 101 | 0 | 1/1 | p10 |
| 2026-10-11 | 101 | 0 | 1/1 | p10 |
| 2026-10-10 | 101 | 0 | 1/1 | p10 |
| 2026-10-09 | 101 | 0 | 1/1 | p10 |
| 2026-10-08 | 117 | 0 | 1/1 | p10 |
Top water assets
- 69Partridge Creekriver
- 69Partridge Creekriver
- 69Big Chino Washriver
- 69Partridge Creekriver
- 69Big Chino Washriver
- 69Big Chino Washriver
- 69Partridge Creekriver
- 69Partridge Creekriver
- 69Big Chino Washriver
- 69Big Chino Washriver