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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
44
Stressed
Drought index
355
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
49%
p20 of record
Water assets
647
0 springs · 121 wells
USGS gauges (2)
- Frio Rv at Tilden, TX082066000 cfsp0 · much below normal
- Choke Canyon Res OWC nr Three Rivers, TX0820691029 cfsp40 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 355 | 100 | 1/2 | p20 |
| 2026-10-18 | 355 | 100 | 1/2 | p15 |
| 2026-10-17 | 355 | 100 | 1/2 | p13 |
| 2026-10-16 | 355 | 100 | 1/2 | p13 |
| 2026-10-15 | 344 | 100 | 1/2 | p22 |
| 2026-10-14 | 344 | 100 | 1/2 | p14 |
| 2026-10-13 | 344 | 100 | 1/2 | p17 |
| 2026-10-12 | 344 | 100 | 2/2 | p12 |
| 2026-10-11 | 344 | 100 | 2/2 | p12 |
| 2026-10-10 | 344 | 100 | 2/2 | p12 |
| 2026-10-09 | 344 | 100 | 1/2 | p14 |
| 2026-10-08 | 330 | 100 | 1/2 | p19 |
| 2026-10-07 | 330 | 100 | 1/2 | p37 |
| 2026-10-06 | 330 | 100 | 1/2 | p37 |
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