Buffalo-San Jacinto HUC8 12040104
A 3,063 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
71
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
4%
of 25 reporting
Median flow
312%
p70 of record
Water assets
1,847
2 springs · 1,674 wells
USGS gauges (35)
- Buffalo Bayou at Houston, TX08074000429 cfsp13 · below normal
- Vince Bayou at Pasadena, TX080757302 cfsp33 · normal
- Berry Bayou at Nevada St, Houston, TX080756054 cfsp48 · normal
- S Mayde Ck at Heathergold Dr nr Addicks, TX0807268033 cfsp55 · normal
- Langham Ck at Addicks Res Outflow nr Addicks, TX08073100213 cfsp56 · normal
- Garners Bayou nr Humble, TX0807618024 cfsp56 · normal
- Buffalo Bayou at State Hwy 6 nr Addicks, TX08072600192 cfsp60 · normal
- Whiteoak Bayou at Alabonson Rd, Houston, TX0807402059 cfsp62 · normal
- Buffalo Bayou at W Belt Dr, Houston, TX08073600482 cfsp65 · normal
- Buffalo Bayou at Piney Point, TX08073700494 cfsp66 · normal
- Brays Bayou at Alief, TX0807476051 cfsp66 · normal
- Sims Bayou at Hiram Clarke St, Houston, TX0807540017 cfsp68 · normal
- Brays Bayou at Gessner Dr, Houston, TX08074810183 cfsp70 · normal
- Langham Ck at W Little York Rd nr Addicks, TX0807276031 cfsp72 · normal
- Brays Bayou at Houston, TX08075000236 cfsp82 · above normal
- Buffalo Bayou nr Addicks, TX08073500452 cfsp82 · above normal
- Halls Bayou at Houston, TX0807650035 cfsp82 · above normal
- Hunting Bayou at IH 610, Houston, TX0807577032 cfsp87 · above normal
- Hunting Bayou at Hoffman St, Houston, TX0807576310 cfsp87 · above normal
- Whiteoak Bayou at Houston, TX08074500270 cfsp88 · above normal
- Bear Ck nr Barker, TX0807273044 cfsp90 · much above normal
- Greens Bayou nr US Hwy 75 nr Houston, TX08075900173 cfsp91 · much above normal
- Buffalo Bayou nr Katy, TX08072300169 cfsp93 · much above normal
- Greens Bayou nr Houston, TX08076000296 cfsp94 · much above normal
- Keegans Bayou at Roark Rd nr Houston, TX08074800107 cfsp98 · much above normal
- San Jacinto Rv nr Sheldon, TX080720501,160 cfsno long-term record
- Mason Ck at Prince Ck Court nr Houston, TX0807247043 cfsno long-term record
- Clodine Ditch at Noble Rd nr Addicks, TX0807252042 cfsno long-term record
- Cole Ck at Deihl Rd, Houston, TX08074150210 cfsno long-term record
- Brickhouse Gully at Costa Rica St, Houston, TX08074250249 cfsno long-term record
- Little Whiteoak Bayou at Trimble St, Houston, TX08074540104 cfsno long-term record
- Brays Bayou at MLK Jr Blvd, Houston, TX080751103,150 cfsno long-term record
- Sims Bayou at Houston, TX080755001,820 cfsno long-term record
- Greens Bayou at Cutten Rd nr Houston, TX08075780100 cfsno long-term record
- Greens Bayou at Ley Rd, Houston, TX080767002,000 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 100 | 0 | 1/25 | p70 |
Top water assets
- 80Gulf Coast Aquifer — Houston-Galveston Regionaquifer
- 66Lake Houston Damreservoir
- 66Barker Damreservoir
- 66Addicks Damreservoir
- 65Buffalo Bayou At State Hwy 6 Nr Addicks, Txriver
- 65Greens Bayouriver
- 65Buffalo Bayou Nr Addicks, Txriver
- 65Langham Ck At W Little York Rd Nr Addicks, Txriver
- 65Langham Ck At Addicks Res Outflow Nr Addicks, Txriver
- 65Brays Bayou At Gessner Dr, Houston, Txriver