Upper Frio HUC8 12110106
A 6,063 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
73
Moderate
Drought index
20
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
43%
of 7 reporting
Median flow
217%
p56 of record
Water assets
1,860
82 springs · 610 wells
USGS gauges (9)
- Frio Rv bl Dry Frio Rv nr Uvalde, TX081975000 cfsp10 · below normal
- Leona Rv nr Uvalde, TX082040050 cfsp10 · below normal
- Frio Rv nr Derby, TX082055000 cfsp10 · below normal
- Dry Frio Rv nr Reagan Wells, TX0819600015 cfsp56 · normal
- Sabinal Rv nr Sabinal, TX0819800022 cfsp59 · normal
- Frio Rv at Concan, TX0819500094 cfsp72 · normal
- Sabinal Rv at Sabinal, TX0819850030 cfsp97 · much above normal
- Sabinal Rv bl Mill Ck nr Vanderpool, TX081979361 cfsno long-term record
- Leona Rv at CR 429A nr Uvalde, TX082034500 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 20 | 0 | 3/7 | p56 |
Top water assets
- 67East Frio Riverriver
- 66Leona River Ws Scs Site 3 Damreservoir
- 65Frio Riverriver
- 65Leona River Ws Scs Site 2A Damreservoir
- 65East Frio Riverriver
- 65Frio Riverriver
- 65Frio Rv At Concan, Txriver
- 65West Frio Riverriver
- 65Cooks Sloughriver
- 65Elm Creekriver