Lower San Antonio HUC8 12100303
A 3,846 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
66
Moderate
Drought index
190
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
29%
of 7 reporting
Median flow
81%
p36 of record
Water assets
743
15 springs · 250 wells
USGS gauges (7)
- Ecleto Ck nr Runge, TX081865000 cfsp10 · below normal
- Escondido Ck at Kenedy, TX081875000 cfsp10 · below normal
- San Antonio Rv nr Floresville, TX08183200135 cfsp32 · normal
- San Antonio Rv at Goliad, TX08188500198 cfsp36 · normal
- San Antonio Rv nr Falls City, TX08183500167 cfsp37 · normal
- San Antonio Rv at SH 72 nr Runge, TX08188060183 cfsp44 · normal
- San Antonio Rv nr McFaddin, TX08188570243 cfsp54 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 190 | 0 | 2/7 | p36 |
Top water assets
- 66Escondido Creek Ws Scs Site 4 Damreservoir
- 66Escondido Creek Ws Scs Site 12 Damreservoir
- 66Ecleto Creek Ws Nrcs Site 3 Damreservoir
- 66Escondido Creek Ws Scs Site 2 Damreservoir
- 66Escondido Creek Ws Scs Site 8 Damreservoir
- 66Escondido Creek Ws Scs Site 3 Damreservoir
- 66Hondo Creek Ws Scs Site 2 Damreservoir
- 66Escondido Creek Ws Scs Site 6 Damreservoir
- 66Escondido Creek Ws Scs Site 13 Damreservoir
- 66Escondido Creek Ws Scs Site 9 Damreservoir