Uvalde County, Texas
The dominant drainage class is 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 Uvalde County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Rock outcrop-Real association, steep | 119K | D | Very limited | Very limited | |
| Knippa clay, 0 to 1 percent slopes | 85K | Well drained | C | Somewhat limited | Very limited |
| Rock Outcrop-Ector, warm, complex, 10 to 40 percent slopes | 80K | D | Very limited | Very limited | |
| Uvalde clay loam, 0 to 1 percent slopes | 73K | Well drained | C | Somewhat limited | Very limited |
| Olmos and Langtry soils undifferentiated, 1 to 8 percent slopes | 52K | Well drained | D | Very limited | Very limited |
| Ector-Rock outcrop complex, warm, 5 to 20 percent slopes | 50K | Well drained | D | Very limited | Very limited |
| Real and Eckrant soils, undulating | 46K | Well drained | D | Very limited | Very limited |
| Olmos very cobbly loam, 1 to 8 percent slopes | 43K | Well drained | D | Very limited | Very limited |
| Montell clay, 0 to 1 percent slopes | 42K | Moderately well drained | D | Very limited | Very limited |
| Ector soils, warm, 1 to 8 percent slopes | 40K | Well drained | D | Very limited | Very limited |
| Uvalde clay loam, 1 to 3 percent slopes | 35K | Well drained | C | Somewhat limited | Very limited |
| Speck association, 1 to 8 percent slopes | 28K | Well drained | D | Very limited | Very limited |
| Hindes-Yologo complex, 1 to 8 percent slopes | 24K | Well drained | C | Not limited | Very limited |
| Dev extremely gravelly clay loam, 0 to 3 percent slopes, frequently flooded | 22K | Well drained | A | Very limited | Very limited |
| Eckrant soils, undulating | 19K | Well drained | D | Very limited | Very limited |
| Pratley clay, 0 to 3 percent slopes | 19K | Well drained | C | Very limited | Very limited |
| Knippa clay, 1 to 3 percent slopes | 19K | Well drained | C | Somewhat limited | Very limited |
| Atco loam, 0 to 1 percent slopes | 16K | Well drained | B | Not limited | Somewhat limited |
| Kavett clay, 0 to 3 percent slopes | 14K | Well drained | D | Very limited | Very limited |
| Castroville clay loam, 0 to 1 percent slopes | 13K | Well drained | B | Somewhat limited | Somewhat limited |
What This Means
Building & Foundations
About 68% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, 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
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.