Presidio 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 Presidio County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Murray-Marfa-Boracho association, 1 to 5 percent slopes | 176K | Well drained | B | Not limited | Somewhat limited |
| Corazones-Ojinaga complex, 1 to 12 percent slopes | 121K | Well drained | A | Not limited | Not limited |
| Chinati-Boracho-Berrend association, 1 to 15 percent slopes | 107K | Well drained | D | Very limited | Very limited |
| Brewster-Rock outcrop complex, 20 to 70 percent slopes | 105K | Well drained | D | Very limited | Very limited |
| Musquiz clay loam, 0 to 3 percent slopes | 101K | Well drained | C | Somewhat limited | Very limited |
| Brewster-Rock outcrop complex, 10 to 30 percent slopes | 96K | Well drained | D | Very limited | Very limited |
| Pantak and Lingua soils, and Rock outcrop, 10 to 30 percent slopes | 94K | Well drained | D | Very limited | Very limited |
| Manzanillo and Paisano soils, 1 to 30 percent slopes | 82K | Well drained | D | Very limited | Very limited |
| Chinati-Boracho complex, 5 to 20 percent slopes | 77K | Well drained | D | Very limited | Very limited |
| Corazones-Ojinaga complex, 10 to 40 percent slopes | 72K | Well drained | A | Very limited | Very limited |
| Geefour-Corazones-Ojinaga association, 5 to 45 percent slopes | 68K | Well drained | D | Very limited | Very limited |
| Marfa clay loam, 0 to 2 percent slopes, occasionally flooded | 63K | Well drained | C | Very limited | Very limited |
| Manzanillo-Chilicotal-Holguin association, 1 to 30 percent slopes | 61K | Well drained | D | Very limited | Very limited |
| Scotal-Ohtwo-Rock outcrop complex, 20 to 70 percent slopes | 61K | Well drained | D | Very limited | Very limited |
| Riverwash and Pantera soils, 0 to 2 percent slopes, frequently flooded | 57K | Excessively drained | A | Not rated | Not rated |
| Studybutte very gravelly sandy clay loam, 5 to 30 percent slopes | 55K | Well drained | D | Very limited | Very limited |
| Chilimol-Boracho-Berrend complex, 1 to 8 percent slopes | 55K | Well drained | B | Not limited | Very limited |
| Phantom-Musquiz complex, 1 to 5 percent slopes | 49K | Well drained | C | Very limited | Very limited |
| Rock outcrop-Terlingua complex, 20 to 70 percent slopes | 45K | D | Very limited | Very limited | |
| Espy-Eppenauer complex, 1 to 5 percent slopes | 42K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 67% 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 77% 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.