La Salle County, Texas
The most common soil here is Duval, on about 13% of the land: a very fine sandy loam, gritty and crumbly. Maverick and Cotulla come next.
About 62% of the land drains well, and 3% stays wet for long stretches.
USDA rates 73% of the land very limited for a standard septic drain field, and 49% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 18% of the land floods occasionally or more, and bedrock lies within 40 inches under 14% 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 La Salle 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 D (very slow infiltration, high runoff). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 La Salle 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 |
|---|---|---|---|---|---|
| Maverick clay, gently undulating | 102K | Well drained | D | Very limited | Very limited |
| Cotulla clay, 0 to 3 percent slopes | 77K | Moderately well drained | D | Very limited | Very limited |
| Duval loamy fine sand, 0 to 5 percent slopes | 68K | Well drained | B | Not limited | Somewhat limited |
| Brundage fine sandy loam, 0 to 2 percent slopes | 63K | Moderately well drained | D | Somewhat limited | Very limited |
| Moglia clay loam, 1 to 5 percent slopes | 61K | Well drained | C | Somewhat limited | Very limited |
| Lasalle clay, gently undulating | 55K | Moderately well drained | D | Very limited | Very limited |
| Webb fine sandy loam, 0 to 3 percent slopes | 53K | Well drained | C | Somewhat limited | Very limited |
| Duval very fine sandy loam, 0 to 3 percent slopes | 45K | Well drained | B | Not limited | Somewhat limited |
| Brystal very fine sandy loam, 0 to 3 percent slopes | 45K | Well drained | B | Not limited | Somewhat limited |
| Imogene very fine sandy loam, occasionally flooded | 44K | Moderately well drained | D | Very limited | Very limited |
| Duval very fine sandy loam, 1 to 3 percent slopes | 39K | Well drained | B | Not limited | Somewhat limited |
| Poteet very fine sandy loam, occasionally flooded | 38K | Moderately well drained | C | Very limited | Very limited |
| Caid very fine sandy loam, 0 to 3 percent slopes | 34K | Well drained | B | Not limited | Somewhat limited |
| Dilley fine sandy loam, gently undulating | 33K | Well drained | D | Very limited | Very limited |
| Coquat clay, 0 to 1 percent slopes, frequently flooded | 27K | Somewhat poorly drained | D | Very limited | Very limited |
| Cochina clay, 0 to 1 percent slopes, occasionally flooded | 25K | Moderately well drained | D | Very limited | Very limited |
| Bookout clay loam, 0 to 3 percent slopes | 23K | Well drained | C | Somewhat limited | Very limited |
| Cochina clay, 0 to 1 percent slopes, frequently flooded | 23K | Moderately well drained | D | Very limited | Very limited |
| Mata gravelly sandy clay loam, gently undulating | 14K | Well drained | B | Not limited | Somewhat limited |
| Charco-Altita complex, nearly level | 12K | Well drained | D | Very 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 49% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 73% 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.