San Ambrosia-Santa Isabel HUC8 13080002
A 14,940 km² sub-basin of the Rio Grande region in MX, TX. 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
72
Moderate
Drought index
127
Moderate
Area in D2+
5.71%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
521%
p70 of record
Water assets
477
8 springs · 223 wells
USGS gauges (1)
- Zacate Ck at Laredo, TX084589952 cfsp70 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 127 | 5.71 | 0/1 | p70 |
Top water assets
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- 65Pilla Tank Damreservoir
- 65Palafox Mine Pond Sp-12 Damreservoir
- 65Lower Guajalote Damreservoir
- 65Ojitos Trap Damreservoir