Llano HUC8 12090204
A 6,770 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
82
Healthy
Drought index
28
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 5 reporting
Median flow
165%
p71 of record
Water assets
1,541
140 springs · 188 wells
USGS gauges (5)
- Beaver Ck nr Mason, TX081508001 cfsp49 · normal
- Llano Rv at Llano, TX08151500151 cfsp61 · normal
- Llano Rv nr Mason, TX08150700196 cfsp71 · normal
- Llano Rv nr Junction, TX08150000149 cfsp78 · above normal
- S Llano Rv at Flat Rock Ln at Junction, TX08149900102 cfsp82 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 28 | 0 | 0/5 | p71 |
Top water assets
- 65Llano Riverriver
- 65Llano Riverriver
- 65James Riverriver
- 65Llano Riverriver
- 65James Riverriver
- 65Llano Riverriver
- 65James Riverriver
- 65Llano Rv At Llano, Txriver
- 65Little Llano Riverriver
- 65Llano Riverriver