This page summarizes USDA SSURGO mapped soil information for Travis County, Texas.
The largest mapped unit is Brackett-Rock outcrop complex, 1 to 12 percent slopes (BlD), covering 17.28% of the mapped soil area shown here. Other leading units include Houston Black clay, 1 to 3 percent slopes (11.2%) and Brackett-Rock outcrop-Real complex, 8 to 30 percent slopes (8.96%).
Map-unit acreage and percentages describe mapped SSURGO soil area in the county. Component rows estimate the acreage of named soils by applying each component’s SSURGO proportion to mapped unit area; those components are not separately drawn polygon boundaries. The largest estimate is Brackett (16.26% of mapped area).
Drainage classes describe how quickly excess water is removed from soil, while hydrologic soil groups classify runoff potential under specified conditions. Neither is a parcel-level verdict. The coverage percentage below compares mapped soil area with Census county land area. For a particular address, use the lookup below and review its location-level sources.
This county summary is not an interactive map. The USDA NRCS tool opens separately; choose Texas and Travis County in Quick Navigation, then define an Area of Interest before viewing soil maps or reports.
Coverage measures mapped SSURGO intersection with Census land geometry. It does not mean that every parcel or point has complete soil information.
County summaries provide regional context across mapped soil units. Address lookup combines available public datasets for the Census-matched location.
| Symbol | Map Unit Name | Mapped Acres | % of Mapped Area |
|---|---|---|---|
| BlD | Brackett-Rock outcrop complex, 1 to 12 percent slopes | 109,819.89 | 17.28% |
| HnB | Houston Black clay, 1 to 3 percent slopes | 71,170.84 | 11.2% |
| BoF | Brackett-Rock outcrop-Real complex, 8 to 30 percent slopes | 56,924.91 | 8.96% |
| TaD | Eckrant very stony clay, 5 to 18 percent slopes | 34,369.13 | 5.41% |
| TcA | Eckrant and Speck soils, 0 to 2 percent slopes | 25,691.76 | 4.04% |
| HnC2 | Houston Black clay, 3 to 5 percent slopes, moderately eroded | 22,495.26 | 3.54% |
| VoD | Volente silty clay loam, 1 to 8 percent slopes | 19,977.01 | 3.14% |
| Tw | Tinn clay, 0 to 1 percent slopes, frequently flooded | 15,994.84 | 2.52% |
| HeC2 | Heiden clay, 3 to 5 percent slopes, eroded | 15,709.14 | 2.47% |
| FhF3 | Ferris-Heiden complex, 8 to 20 percent slopes, severely eroded | 14,813.84 | 2.33% |
| TdF | Eckrant-Rock outcrop complex, 18 to 50 percent slopes | 13,290.36 | 2.09% |
| SsC | Speck clay loam, moist, 1 to 5 percent slopes, stony | 12,872.51 | 2.03% |
| HeD2 | Heiden clay, 5 to 8 percent slopes, eroded | 12,435.94 | 1.96% |
| UtD | Urban land, Austin, and Whitewright soils, 1 to 8 percent slopes | 9,914.14 | 1.56% |
| HsD | Houston Black soils and Urban land, 0 to 8 percent slopes | 8,326.57 | 1.31% |
| Component | Drainage Class | Hydrologic Group | Estimated Acres | % of Mapped Area |
|---|---|---|---|---|
| Brackett | Well drained | D | 103,364.23 | 16.26% |
| Houston Black | Moderately well drained | D | 99,281.64 | 15.62% |
| Eckrant | Well drained | D | 70,033.95 | 11.02% |
| Heiden | Well drained | D | 46,965 | 7.39% |
| Rock outcrop | Well drained | D | 43,913.02 | 6.91% |
| Volente | Well drained | C | 23,808.07 | 3.75% |
| Urban land | Well drained | D | 21,987.02 | 3.46% |
| Austin | Well drained | C, D | 21,660.3 | 3.41% |
| Speck | Well drained | D | 21,079.87 | 3.32% |
| Tinn | Moderately well drained | D | 15,806.97 | 2.49% |
| Lewisville | Well drained | C, B | 13,980.22 | 2.2% |
| Bergstrom | Well drained | B | 12,700.07 | 2% |
| Real | Well drained | D | 12,523.48 | 1.97% |
| Ferris | Well drained | D | 11,698.39 | 1.84% |
| Burleson | Moderately well drained | D | 9,583.46 | 1.51% |
Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.