Medina HUC8 12100302
A 3,492 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
69
Moderate
Drought index
66
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
40%
of 10 reporting
Median flow
68%
p36 of record
Water assets
1,913
164 springs · 945 wells
USGS gauges (11)
- Medina Rv nr Somerset, TX081808009 cfsp6 · much below normal
- Helotes Ck at Helotes, TX081814000 cfsp10 · below normal
- Medina Rv nr Macdona, TX081807002 cfsp11 · below normal
- Medina Rv at La Coste, TX0818064010 cfsp17 · below normal
- Medina Rv at San Antonio, TX0818150062 cfsp34 · normal
- Medina Rv at Bandera, TX0817888018 cfsp38 · normal
- Leon Ck at Lp 410 at San Antonio, TX081814350 cfsp51 · normal
- San Geronimo Ck nr Helotes, TX081805861 cfsp55 · normal
- Leon Ck at IH 35, San Antonio, TX0818148012 cfsp79 · above normal
- Medina Rv at Patterson Rd at Medina, TX081788735027 cfsp82 · above normal
- Medina Rv abv English Crsg nr Pipe Creek, TX0817898031 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 66 | 0 | 4/10 | p36 |
Top water assets
- 79Edwards Aquifer Deep Fossil Zone — San Antoniofossil_water
- 67Medina Lake Damreservoir
- 66Medina Diversion Lake Damreservoir
- 66Rock Cliff Damreservoir
- 66Walton Lake Damreservoir
- 66Wildlake Damreservoir
- 66Brewington Creek Ranch Damreservoir
- 66Montague Lake Damreservoir
- 66Love Creek Damreservoir
- 66White Lake Damreservoir