Webb 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 Webb County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Maverick-Catarina complex, gently rolling | 284K | Well drained | D | Very limited | Very limited |
| Copita fine sandy loam, 0 to 3 percent slopes | 190K | Well drained | C | Somewhat limited | Very limited |
| Montell clay, 0 to 3 percent slopes | 173K | Moderately well drained | D | Very limited | Very limited |
| Catarina clay, 0 to 2 percent slopes | 163K | Moderately well drained | D | Very limited | Very limited |
| Moglia clay loam, 1 to 5 percent slopes | 150K | Well drained | C | Somewhat limited | Very limited |
| Aguilares sandy clay loam, 0 to 3 percent slopes | 123K | Well drained | B | Not limited | Somewhat limited |
| Duval very fine sandy loam, 0 to 3 percent slopes | 111K | Well drained | B | Not limited | Somewhat limited |
| Brundage fine sandy loam, 0 to 1 percent slopes, occasionally flooded | 106K | Moderately well drained | D | Very limited | Very limited |
| Jimenez-Quemado complex, undulating | 96K | Well drained | D | Very limited | Very limited |
| Hebbronville loamy fine sand, 0 to 2 percent slopes | 84K | Well drained | A | Not limited | Not limited |
| Brystal fine sandy loam, 0 to 3 percent slopes | 80K | Well drained | B | Not limited | Somewhat limited |
| Tela sandy clay loam, 0 to 1 percent slopes, frequently flooded | 77K | Well drained | B | Very limited | Very limited |
| Palafox clay loam, 0 to 3 percent slopes | 76K | Well drained | C | Somewhat limited | Very limited |
| Monwebb clay, 0 to 1 percent slopes, occasionally flooded | 69K | Moderately well drained | D | Very limited | Very limited |
| Delmita-Randado complex, 0 to 3 percent slopes | 54K | Well drained | C | Very limited | Very limited |
| Cuevitas-Randado complex, 0 to 3 percent slopes | 53K | Well drained | D | Very limited | Very limited |
| Viboras clay, 0 to 3 percent slopes | 52K | Moderately well drained | D | Very limited | Very limited |
| Catarina clay, 0 to 1 percent slopes, occasionally flooded | 37K | Moderately well drained | D | Very limited | Very limited |
| Verick fine sandy loam, 1 to 5 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Dilley fine sandy loam, 0 to 3 percent slopes | 28K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 60% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 80% 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.