Guadalupe County, Texas
The dominant drainage class is Moderately well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Guadalupe County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Patilo and Arenosa soils, 1 to 8 percent slopes | 53K | Moderately well drained | A | Somewhat limited | Very limited |
| Branyon clay, 0 to 1 percent slopes | 45K | Moderately well drained | D | Very limited | Very limited |
| Houston Black clay, 1 to 3 percent slopes | 40K | Moderately well drained | D | Very limited | Very limited |
| Crockett loam, 2 to 5 percent slopes, eroded | 33K | Moderately well drained | D | Very limited | Very limited |
| Robco-Tanglewood complex, 1 to 5 percent slopes | 32K | Moderately well drained | A | Somewhat limited | Very limited |
| Windthorst fine sandy loam, 1 to 5 percent slopes, eroded | 20K | Moderately well drained | C | Somewhat limited | Very limited |
| Crockett fine sandy loam, 1 to 3 percent slopes | 19K | Moderately well drained | C | Very limited | Very limited |
| Heiden clay, 3 to 5 percent slopes, eroded | 15K | Well drained | D | Very limited | Very limited |
| Tinn clay, 0 to 1 percent slopes, frequently flooded | 13K | Moderately well drained | D | Very limited | Very limited |
| Barbarosa silty clay, 0 to 1 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Uhland soils frequently flooded | 12K | Moderately well drained | C | Very limited | Very limited |
| Houston Black gravelly clay, 3 to 5 percent slopes | 12K | Moderately well drained | D | Very limited | Very limited |
| Branyon clay, 1 to 3 percent slopes | 11K | Moderately well drained | D | Very limited | Very limited |
| Ferris and Heiden soils, 5 to 20 percent slopes, eroded | 9K | Well drained | D | Very limited | Very limited |
| Mabank loam, 1 to 3 percent slopes | 9K | Moderately well drained | D | Very limited | Very limited |
| Vernia very gravelly loamy sand, 1 to 5 percent slopes | 8K | Well drained | A | Not limited | Somewhat limited |
| Crockett gravelly fine sandy loam, 1 to 5 percent slopes | 7K | Moderately well drained | C | Very limited | Very limited |
| Tinn clay, 0 to 1 percent slopes, occasionally flooded | 7K | Moderately well drained | D | Very limited | Very limited |
| Sunev loam, 0 to 1 percent slopes | 6K | Well drained | B | Not limited | Somewhat limited |
| Lewisville silty clay, 1 to 3 percent slopes | 6K | Well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 67% of soils are rated "very limited" for dwellings with basements. Specific challenges include flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 96% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.