San Patricio and Aransas Counties, Texas
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 San Patricio and Aransas Counties, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Victoria clay 0 to 1 percent slopes | 158K | Well drained | C | Very limited | Very limited |
| Water | 131K | D | Not rated | Not rated | |
| Calallen sandy clay loam, 0 to 1 percent slopes | 64K | Well drained | B | Somewhat limited | Somewhat limited |
| Galveston-Mustang complex, 0 to 3 percent slopes, occasionally flooded, frequently ponded | 62K | Moderately well drained | A | Very limited | Very limited |
| Raymondville clay loam, 0 to 1 percent slopes | 54K | Moderately well drained | C | Very limited | Very limited |
| Narta loam, 0 to 1 percent slopes, rarely flooded | 26K | Poorly drained | D | Very limited | Very limited |
| Papalote fine sandy loam, 0 to 1 percent slopes | 25K | Moderately well drained | C | Somewhat limited | Very limited |
| Aransas clay, 0 to 1 percent slopes, slightly saline, moderately sodic, frequently flooded | 23K | Poorly drained | C/D | Very limited | Very limited |
| Mustang fine sand, 0 to 1 percent slopes, occasionally flooded, frequently ponded | 18K | Poorly drained | C/D | Very limited | Very limited |
| Barrada-Tatton association, 0 to 1 percent slopes, occasionally ponded | 18K | Very poorly drained | D | Very limited | Very limited |
| Banquete clay, 0 to 1 percent slopes | 15K | Moderately well drained | C | Very limited | Very limited |
| Orelia fine sandy loam, 0 to 1 percent slopes | 14K | Well drained | C | Somewhat limited | Very limited |
| Victoria clay, 0 to 1 percent slopes, low | 14K | Somewhat poorly drained | D | Very limited | Very limited |
| Dianola soils | 11K | Poorly drained | A | Very limited | Very limited |
| Victine clay loam, 0 to 1 percent slopes | 11K | Somewhat poorly drained | D | Very limited | Very limited |
| Delfina loamy fine sand, 0 to 3 percent slopes | 9K | Moderately well drained | C | Somewhat limited | Very limited |
| Tatton complex, 0 to 1 percent slopes, occasionally ponded | 7K | Very poorly drained | A/D | Very limited | Very limited |
| Papalote fine sandy loam, 1 to 3 percent slopes | 7K | Moderately well drained | C | Somewhat limited | Very limited |
| Beaches | 6K | Very poorly drained | A | Very limited | Very limited |
| Dietrich loamy fine sand, 0 to 1 percent slopes, very rarely flooded | 6K | Poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 63% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 71% 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.