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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
51
Moderate
Drought index
213
Severe
Area in D2+
12.64%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
75%
p32 of record
Water assets
799
0 springs · 707 wells
USGS gauges (3)
- Clear Ck at Mykawa St nr Pearland, TX080769975 cfsp9 · much below normal
- Chocolate Bayou nr Alvin, TX0807800014 cfsp54 · normal
- Clear Ck nr Friendswood, TX080776002,500 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-18 | 213 | 12.64 | 1/2 | p32 |
| 2026-10-17 | 213 | 12.64 | 1/2 | p31 |
| 2026-10-16 | 213 | 12.64 | 1/2 | p31 |
| 2026-10-15 | 167 | 0 | 1/2 | p30 |
| 2026-10-14 | 167 | 0 | 1/2 | p32 |
| 2026-10-13 | 167 | 0 | 1/2 | p36 |
| 2026-10-12 | 167 | 0 | 1/2 | p32 |
| 2026-10-11 | 167 | 0 | 1/2 | p39 |
| 2026-10-10 | 167 | 0 | 0/2 | p41 |
| 2026-10-09 | 167 | 0 | 0/2 | p41 |
| 2026-10-08 | 167 | 0 | 1/2 | p41 |
| 2026-10-07 | 167 | 0 | 0/2 | p50 |
| 2026-10-06 | 167 | 0 | 0/2 | p51 |
| 2026-10-05 | 167 | 0 | 0/2 | p51 |
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