Draft 2026 Water Body Assessment by Basin
2026 water quality assessments in PDF for each of Texas’ river and coastal basins.
Where sufficient data were available, TCEQ assessed the water quality of all classified and unclassified water bodies as defined in the Texas Surface Water Quality Standards. Each report includes the level of support for water bodies’ intended uses that determines if they will be included in Category 5 [the 303(d) List of Impaired Waters]. These assessments are grouped by basin in the links below.
- 1—Canadian River Basin
- 2—Red River Basin
- 3—Sulphur River Basin
- 4—Cypress Creek Basin
- 5—Sabine River Basin
- 6—Neches River Basin
- 7—Neches-Trinity Coastal Basin
- 8—Trinity River Basin
- 9—Trinity–San Jacinto Coastal Basin
- 10—San Jacinto River Basin
- 11—San Jacinto–Brazos Coastal Basin
- 12—Brazos River Basin
- 13—Brazos-Colorado Coastal Basin
- 14—Colorado River Basin
- 15—Colorado-Lavaca Coastal Basin
- 16—Lavaca River Basin
- 17—Lavaca-Guadalupe Coastal Basin
- 18—Guadalupe River Basin
- 19—San Antonio River Basin
- 20—San Antonio–Nueces Coastal Basin
- 21—Nueces River Basin
- 22—Nueces–Rio Grande Coastal Basin
- 23—Rio Grande Basin
- 24—Bays and Estuaries
- 25—Gulf Waters