Medina 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 Medina County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Eckrant-Rock outcrop association, 1 to 10 percent slopes | 53K | Well drained | D | Very limited | Very limited |
| Eckrant-Rock outcrop association, 8 to 30 percent slopes | 50K | Well drained | D | Very limited | Very limited |
| Knippa clay, 0 to 1 percent slopes | 48K | Well drained | C | Somewhat limited | Very limited |
| Speck association, 1 to 8 percent slopes | 43K | Well drained | D | Very limited | Very limited |
| Olmos very cobbly loam, 1 to 8 percent slopes, rubbly | 35K | Well drained | D | Very limited | Very limited |
| Montell clay, 0 to 1 percent slopes | 34K | Moderately well drained | D | Very limited | Very limited |
| Castroville clay loam, 0 to 1 percent slopes | 33K | Well drained | B | Somewhat limited | Somewhat limited |
| Yologo gravelly loam, 1 to 8 percent slopes | 30K | Well drained | D | Very limited | Very limited |
| Victoria clay, 0 to 1 percent slopes | 29K | Somewhat poorly drained | D | Very limited | Very limited |
| Real association, undulating | 29K | Well drained | D | Very limited | Very limited |
| Divot clay loam, occasionally flooded | 28K | Well drained | C | Very limited | Very limited |
| Monteola gravelly clay, 1 to 5 percent slopes | 22K | Moderately well drained | D | Very limited | Very limited |
| Duval very fine sandy loam, 1 to 3 percent slopes | 20K | Well drained | B | Not limited | Somewhat limited |
| Nusil soils, 0 to 5 percent slopes | 18K | Moderately well drained | C | Not limited | Very limited |
| Pratley clay, 0 to 3 percent slopes | 18K | Well drained | C | Very limited | Very limited |
| Eckrant-rock outcrop-kerrville association, steep | 17K | D | Very limited | Very limited | |
| Quihi association, gently undulating | 16K | Well drained | C | Somewhat limited | Very limited |
| Atco loam, 0 to 1 percent slopes | 16K | Well drained | B | Not limited | Somewhat limited |
| Monteola clay, 1 to 5 percent slopes | 15K | Moderately well drained | D | Very limited | Very limited |
| Castroville clay loam, 1 to 3 percent slopes | 15K | Well drained | B | Somewhat limited | Somewhat limited |
What This Means
Building & Foundations
About 70% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 85% 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.