Castro County, Texas
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Castro County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Pullman clay loam, 0 to 1 percent slopes | 237K | Well drained | C | Somewhat limited | Very limited |
| Olton clay loam, 0 to 1 percent slopes | 126K | Well drained | C | Somewhat limited | Very limited |
| Olton clay loam, 1 to 3 percent slopes | 32K | Well drained | C | Somewhat limited | Very limited |
| Estacado clay loam, 0 to 1 percent slopes | 30K | Well drained | B | Somewhat limited | Somewhat limited |
| Estacado clay loam, 1 to 3 percent slopes | 29K | Well drained | B | Somewhat limited | Somewhat limited |
| Pullman clay loam, 1 to 3 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Randall clay, 0 to 1 percent slopes, occasionally ponded | 19K | Poorly drained | D | Very limited | Very limited |
| Acuff loam, 1 to 3 percent slopes | 12K | Well drained | B | Not limited | Somewhat limited |
| Acuff loam, 0 to 1 percent slopes | 10K | Well drained | B | Not limited | Somewhat limited |
| Pep-Estacado loams, 3 to 5 percent slopes | 9K | Well drained | B | Not limited | Somewhat limited |
| Zita clay loam, 0 to 1 percent slopes | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Lofton clay loam, 0 to 1 percent slopes, occasionally ponded | 7K | Moderately well drained | D | Very limited | Very limited |
| Lazbuddie clay, 0 to 1 percent slopes, occasionally ponded | 6K | Moderately well drained | D | Very limited | Very limited |
| Mansker-Berda loams, 5 to 8 percent slopes | 5K | Well drained | B | Not limited | Somewhat limited |
| Posey loam, 1 to 3 percent slopes | 4K | Well drained | B | Not limited | Very limited |
| Posey loam, 0 to 1 percent slopes | 3K | Well drained | B | Not limited | Very limited |
| Bippus clay loam, 0 to 2 percent slopes, occasionally flooded | 3K | Well drained | B | Very limited | Very limited |
| Berda fine sandy loam, 5 to 8 percent slopes | 3K | Well drained | B | Not limited | Somewhat limited |
| Estacado loam, 1 to 3 percent slopes | 2K | Well drained | B | Somewhat limited | Somewhat limited |
| Bippus and Sprone clay loams, 0 to 2 percent slopes, frequently flooded | 2K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
About 81% 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.