Lower Frio HUC8 12110108
A 3,163 km² sub-basin of the Texas-Gulf region in 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
49
Stressed
Drought index
223
Severe
Area in D2+
40.76%
0% exceptional (D4)
Gauges below normal
100%
of 2 reporting
Median flow
44%
p10 of record
Water assets
647
0 springs · 121 wells
USGS gauges (2)
- Frio Rv at Tilden, TX082066000 cfsp10 · below normal
- Choke Canyon Res OWC nr Three Rivers, TX0820691027 cfsp11 · below normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 223 | 40.76 | 2/2 | p10 |
Top water assets
- 67Choke Canyon Damreservoir
- 65Esperanza Creekriver
- 65Frio Riverriver
- 65Choke Canyon Res Owc Nr Three Rivers, Txriver
- 65Frio Riverriver
- 65Martin Branchriver
- 65Cibolo Creekriver
- 65Cibolo Creekriver
- 65Frio Riverriver
- 65Frio Riverriver