Pedernales HUC8 12090206
A 3,317 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
68
Moderate
Drought index
98
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
37%
p26 of record
Water assets
1,201
124 springs · 295 wells
USGS gauges (2)
- Pedernales Rv nr Johnson City, TX081535006 cfsp20 · below normal
- Pedernales Rv nr Fredericksburg, TX081529005 cfsp33 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 98 | 0 | 1/2 | p26 |
| 2026-10-18 | 98 | 0 | 1/2 | p26 |
| 2026-10-17 | 98 | 0 | 1/2 | p24 |
| 2026-10-16 | 98 | 0 | 0/2 | p29 |
| 2026-10-15 | 98 | 0 | 0/2 | p29 |
| 2026-10-14 | 98 | 0 | 0/2 | p30 |
| 2026-10-13 | 98 | 0 | 0/2 | p34 |
| 2026-10-12 | 98 | 0 | 0/2 | p36 |
| 2026-10-11 | 98 | 0 | 0/2 | p40 |
| 2026-10-10 | 98 | 0 | 0/2 | p44 |
| 2026-10-09 | 98 | 0 | 0/2 | p48 |
| 2026-10-08 | 152 | 7.22 | 0/2 | p51 |
| 2026-10-07 | 152 | 7.22 | 0/2 | p72 |
| 2026-10-06 | 152 | 7.22 | 0/2 | p74 |
Top water assets
- 66Williams Creek Ws Scs Site 1 Damreservoir
- 66Williams Creek Ws Scs Site 2 Damreservoir
- 66Williams Creek Ws Scs Site 4 Damreservoir
- 66Purola Lake Damreservoir
- 66Williams Creek Ws Scs Site 3 Damreservoir
- 66Longhorn Lake Damreservoir
- 65Pedernales Riverriver
- 65White Oak Creekriver
- 65Cypress Creekriver
- 65White Oak Creekriver