Atascosa County, Texas
The most common soil here is Floresville, on about 8% of the land: a fine sandy loam, gritty and crumbly. Monteola and Hanis come next.
About 89% of the land drains well, and 4% stays wet for long stretches.
USDA rates 96% of the land very limited for a standard septic drain field, and 32% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 8% of the land floods occasionally or more, and bedrock lies within 40 inches under 3% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Atascosa County, Texas, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Atascosa County, Texas. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Nusil-Rhymes association, 0 to 5 percent slopes | 62K | Well drained | C | Not limited | Very limited |
| Aluf-Hitilo association, gently undulating | 55K | Somewhat excessively drained | A | Not limited | Very limited |
| Poth loamy fine sand, 0 to 3 percent slopes | 53K | Well drained | C | Not limited | Very limited |
| Floresville fine sandy loam, 1 to 3 percent slopes | 50K | Well drained | C | Somewhat limited | Very limited |
| Webb fine sandy loam, 1 to 3 percent slopes | 47K | Well drained | C | Somewhat limited | Very limited |
| Hanis sandy clay loam, 1 to 3 percent slopes | 46K | Well drained | C | Somewhat limited | Very limited |
| Wilco loamy fine sand, 0 to 3 percent slopes | 38K | Well drained | C | Somewhat limited | Very limited |
| Elmendorf-Denhawken complex, 1 to 4 percent slopes | 36K | Well drained | D | Very limited | Very limited |
| Amphion sandy clay loam, 1 to 3 percent slopes | 34K | Well drained | C | Somewhat limited | Very limited |
| Monteola clay, 1 to 3 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Christine soils, occasionally flooded | 32K | Somewhat poorly drained | C | Very limited | Very limited |
| Imogene fine sandy loam, 0 to 2 percent slopes | 29K | Moderately well drained | D | Somewhat limited | Very limited |
| Miguel fine sandy loam, 1 to 3 percent slopes | 21K | Well drained | C | Somewhat limited | Very limited |
| Monteola clay, saline, 1 to 3 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Campbellton loam, 1 to 3 percent slopes | 15K | Well drained | C | Very limited | Very limited |
| Duval very fine sandy loam, 1 to 3 percent slopes | 14K | Well drained | B | Not limited | Somewhat limited |
| Poteet soils, occasionally flooded | 13K | Moderately well drained | C | Very limited | Very limited |
| Sinton soils, frequently flooded | 13K | Well drained | B | Very limited | Very limited |
| Weigang sandy clay loam, 1 to 5 percent slopes | 12K | Well drained | D | Very limited | Very limited |
| Hindes very gravelly loam, 1 to 8 percent slopes | 12K | Well drained | C | Not limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 32% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 96% 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.