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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
80
Healthy
Drought index
22
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 5 reporting
Median flow
280%
p85 of record
Water assets
1,541
140 springs · 188 wells
USGS gauges (5)
- Beaver Ck nr Mason, TX081508003 cfsp52 · normal
- Llano Rv nr Junction, TX08150000299 cfsp85 · above normal
- Llano Rv nr Mason, TX08150700401 cfsp85 · above normal
- S Llano Rv at Flat Rock Ln at Junction, TX08149900130 cfsp87 · above normal
- Llano Rv at Llano, TX08151500460 cfsp87 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 22 | 0 | 0/5 | p85 |
| 2026-10-19 | 22 | 0 | 0/5 | p87 |
| 2026-10-18 | 22 | 0 | 0/5 | p87 |
| 2026-10-17 | 22 | 0 | 0/5 | p88 |
| 2026-10-16 | 22 | 0 | 0/5 | p82 |
| 2026-10-15 | 22 | 0 | 0/5 | p84 |
| 2026-10-14 | 22 | 0 | 1/5 | p83 |
| 2026-10-13 | 22 | 0 | 1/5 | p84 |
| 2026-10-12 | 22 | 0 | 1/5 | p85 |
| 2026-10-11 | 22 | 0 | 1/5 | p87 |
| 2026-10-10 | 22 | 0 | 1/5 | p87 |
| 2026-10-09 | 22 | 0 | 0/5 | p89 |
| 2026-10-08 | 108 | 0 | 0/5 | p86 |
| 2026-10-07 | 108 | 0 | 0/5 | p93 |
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