Lower San Pedro HUC8 15050203
A 5,133 km² sub-basin of the Lower Colorado region in AZ. 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
53
Moderate
Drought index
89
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 2 reporting
Median flow
21%
p9 of record
Water assets
2,626
179 springs · 768 wells
USGS gauges (2)
- ARAVAIPA CREEK NEAR MAMMOTH, AZ.094730003 cfsp9 · much below normal
- SAN PEDRO R AT REDINGTON BRIDGE NR REDINGTON, AZ094720500 cfsp10 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 89 | 0 | 2/2 | p9 |
Top water assets
- 67Aravaipa Creekriver
- 67San Pedro Riverriver
- 67San Pedro Riverriver
- 67Hot Springs Canyon Creekriver
- 67Camp Grant Washriver
- 67Paige Creekriver
- 67Rattlesnake Creekriver
- 67San Pedro Riverriver
- 67San Pedro Riverriver
- 67Aravaipa Creekriver