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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
59
Moderate
Drought index
164
Moderate
Area in D2+
22.86%
0% exceptional (D4)
Gauges below normal
60%
of 10 reporting
Median flow
56%
p15 of record
Water assets
1,913
164 springs · 945 wells
USGS gauges (11)
- Medina Rv nr Somerset, TX081808008 cfsp6 · much below normal
- Helotes Ck at Helotes, TX081814000 cfsp10 · below normal
- Leon Ck at Lp 410 at San Antonio, TX081814350 cfsp10 · below normal
- Medina Rv nr Macdona, TX081807001 cfsp10 · below normal
- Medina Rv at La Coste, TX081806401 cfsp11 · below normal
- Medina Rv at San Antonio, TX0818150049 cfsp19 · below normal
- Medina Rv at Bandera, TX0817888017 cfsp37 · normal
- Leon Ck at IH 35, San Antonio, TX081814806 cfsp49 · normal
- Medina Rv at Patterson Rd at Medina, TX081788735011 cfsp55 · normal
- San Geronimo Ck nr Helotes, TX081805862 cfsp83 · above normal
- Medina Rv abv English Crsg nr Pipe Creek, TX0817898019 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 164 | 22.86 | 6/10 | p15 |
| 2026-10-18 | 164 | 22.86 | 6/10 | p16 |
| 2026-10-17 | 164 | 22.86 | 5/10 | p18 |
| 2026-10-16 | 164 | 22.86 | 4/10 | p31 |
| 2026-10-15 | 164 | 22.86 | 4/10 | p32 |
| 2026-10-14 | 164 | 22.86 | 4/10 | p31 |
| 2026-10-13 | 164 | 22.86 | 5/10 | p31 |
| 2026-10-12 | 164 | 22.86 | 5/10 | p32 |
| 2026-10-11 | 164 | 22.86 | 4/10 | p35 |
| 2026-10-10 | 164 | 22.86 | 4/10 | p36 |
| 2026-10-09 | 164 | 22.86 | 4/10 | p43 |
| 2026-10-08 | 203 | 17.57 | 4/10 | p44 |
| 2026-10-07 | 203 | 17.57 | 4/10 | p66 |
| 2026-10-06 | 203 | 17.57 | 4/10 | p64 |
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