West Galveston Bay HUC8 12040204
A 3,141 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
74
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
86%
p43 of record
Water assets
799
0 springs · 707 wells
USGS gauges (3)
- Chocolate Bayou nr Alvin, TX0807800021 cfsp35 · normal
- Clear Ck at Mykawa St nr Pearland, TX0807699717 cfsp50 · normal
- Clear Ck nr Friendswood, TX080776002,500 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 100 | 0 | 0/2 | p43 |
Top water assets
- 65Chocolate Bayouriver
- 65Clear Creekriver
- 65Galveston County Water Industrial Reservoir Damreservoir
- 65Chocolate Bayou Nr Alvin, Txriver
- 65Chocolate Bayouriver
- 65Dickinson Bayouriver
- 65Bayport Reservoir Damreservoir
- 65Clear Ck Nr Friendswood, Txriver
- 65Clear Ck At Mykawa St Nr Pearland, Txriver
- 65Armand Bayouriver