Frio County, 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 Frio County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Duval very fine sandy loam, 1 to 3 percent slopes | 106K | Well drained | B | Not limited | Somewhat limited |
| Hindes-Yologo complex, 1 to 8 percent slopes | 61K | Well drained | C | Not limited | Very limited |
| Duval loamy fine sand, 0 to 5 percent slopes | 53K | Well drained | B | Not limited | Somewhat limited |
| Webb very fine sandy loam, 1 to 3 percent slopes | 52K | Well drained | C | Somewhat limited | Very limited |
| Zavco sandy clay loam, 1 to 3 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Poteet very fine sandy loam, occasionally flooded | 26K | Moderately well drained | C | Very limited | Very limited |
| Brystal very fine sandy loam, 1 to 3 percent slopes | 25K | Well drained | B | Not limited | Somewhat limited |
| Uvalde clay loam, 0 to 1 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Duval very fine sandy loam, 0 to 1 percent slopes | 21K | Well drained | B | Not limited | Somewhat limited |
| Poth loamy fine sand, 0 to 3 percent slopes | 19K | Well drained | C | Somewhat limited | Very limited |
| Zavco sandy clay loam, 0 to 1 percent slopes | 18K | Well drained | C | Somewhat limited | Very limited |
| Winterhaven silty clay loam, occasionally flooded | 14K | Well drained | B | Very limited | Very limited |
| Dilley fine sandy loam, 1 to 5 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Webb very fine sandy loam, 0 to 1 percent slopes | 13K | Well drained | C | Somewhat limited | Very limited |
| Elmendorf-Denhawken complex, 1 to 3 percent slopes | 12K | Well drained | D | Very limited | Very limited |
| Miguel very fine sandy loam, 1 to 3 percent slopes | 11K | Well drained | C | Somewhat limited | Very limited |
| Caid sandy clay loam, 1 to 3 percent slopes | 11K | Well drained | B | Not limited | Somewhat limited |
| Caid sandy clay loam, 0 to 1 percent slopes | 11K | Well drained | B | Not limited | Somewhat limited |
| Lacoste very fine sandy loam, 1 to 5 percent slopes | 11K | Well drained | D | Very limited | Very limited |
| Olmos very cobbly loam, 1 to 8 percent slopes, rubbly | 11K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
About 57% 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.