Duval County, Texas
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Duval County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Piedras and Cuevitas soils, 1 to 5 percent slopes | 148K | Well drained | D | Very limited | Very limited |
| Benavides fine sandy loam, 2 to 5 percent slopes | 140K | Well drained | B | Not limited | Somewhat limited |
| Delmita-Randado complex, 0 to 3 percent slopes | 104K | Well drained | C | Very limited | Very limited |
| Olmedo very gravelly sandy loam, 1 to 8 percent slopes | 68K | Well drained | D | Very limited | Very limited |
| Alet sandy clay loam, 0 to 1 percent slopes, occasionally flooded | 63K | Well drained | B | Very limited | Very limited |
| Weesatche fine sandy loam, dry, 1 to 3 percent slopes | 61K | Well drained | B | Not limited | Somewhat limited |
| Delfina fine sandy loam, 0 to 2 percent slopes | 58K | Moderately well drained | C | Not limited | Very limited |
| Houla clay loam, 0 to 3 percent slopes | 53K | Well drained | B | Not limited | Somewhat limited |
| Czar-Clareville complex, 0 to 2 percent slopes, rarely flooded | 33K | Well drained | B | Very limited | Somewhat limited |
| Pernitas fine sandy loam, 1 to 5 percent slopes | 32K | Well drained | B | Somewhat limited | Somewhat limited |
| Colmena fine sandy loam, 0 to 3 percent slopes | 29K | Well drained | B | Somewhat limited | Somewhat limited |
| Delmita fine sandy loam, 0 to 3 percent slopes | 27K | Well drained | C | Very limited | Very limited |
| Delmita and Bruni soils, 0 to 3 percent slopes | 27K | Well drained | C | Very limited | Very limited |
| Grava soils, 1 to 8 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Aguilares fine sandy loam, 0 to 3 percent slopes | 26K | Well drained | B | Not limited | Somewhat limited |
| Lomart loam, 1 to 5 percent slopes | 25K | Well drained | C | Somewhat limited | Very limited |
| Tela sandy clay loam, 0 to 1 percent slopes, occasionally flooded | 25K | Well drained | B | Very limited | Very limited |
| Salco fine sandy loam, 1 to 3 percent slopes | 25K | Well drained | B | Not limited | Somewhat limited |
| Nueces fine sand, 0 to 3 percent slopes | 22K | Moderately well drained | B | Not limited | Somewhat limited |
| Premont fine sandy loam, 0 to 3 percent slopes | 22K | Well drained | B | Somewhat limited | Somewhat limited |
What This Means
Building & Foundations
About 48% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 56% 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.