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 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
81
Healthy
Drought index
60
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
89%
p44 of record
Water assets
1,201
124 springs · 295 wells
USGS gauges (2)
- Pedernales Rv nr Johnson City, TX0815350012 cfsp36 · normal
- Pedernales Rv nr Fredericksburg, TX0815290010 cfsp52 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 60 | 0 | 0/2 | p44 |
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