East San Antonio Bay HUC8 12100403
A 1,346 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
64
Moderate
Drought index
253
Severe
Area in D2+
52.88%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
99%
p49 of record
Water assets
38
0 springs · 22 wells
USGS gauges (1)
- North end of GBRA Calhoun Canal nr Long Mott,TX0818859045 cfsp49 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-20 | 253 | 52.88 | 0/1 | p49 |
| 2026-10-19 | 253 | 52.88 | 0/1 | p25 |
| 2026-10-18 | 253 | 52.88 | 0/1 | p41 |
| 2026-10-17 | 253 | 52.88 | 0/1 | p28 |
| 2026-10-16 | 253 | 52.88 | 1/1 | p21 |
| 2026-10-15 | 270 | 70.1 | 1/1 | p24 |
| 2026-10-14 | 270 | 70.1 | 1/1 | p0 |
| 2026-10-13 | 270 | 70.1 | 1/1 | p0 |
| 2026-10-12 | 270 | 70.1 | 1/1 | p0 |
| 2026-10-11 | 270 | 70.1 | — | — |
| 2026-10-10 | 270 | 70.1 | — | — |
| 2026-10-09 | 270 | 70.1 | 0/1 | p28 |
| 2026-10-08 | 272 | 70.1 | 0/1 | p30 |
| 2026-10-07 | 272 | 70.1 | 1/1 | p20 |
Top water assets
- 55Hog Bayouriver
- 51Texas Water Right 61803861401well
- 51Texas Water Right 61805174002well
- 51Texas Water Right 11703746001well
- 51Texas Water Right 61703864002well
- 51Texas Water Right 11804276501well
- 51Texas Water Right 61703864001well
- 51Texas Water Right 61805176002well
- 51Texas Water Right 61805173002well
- 51Texas Water Right 61805177003well