Sebastian County, Arkansas
The most common soil here is Leadvale, on about 22% of the land: a silt loam, smooth, like flour. Mountainburg and Enders come next.
About 50% of the land drains well, and 15% stays wet for long stretches; groundwater comes within two feet of the surface under 41% of it.
USDA rates 94% of the land very limited for a standard septic drain field, and 85% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 2% of the land floods occasionally or more, and bedrock lies within 40 inches under 41% 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 Sebastian County, Arkansas, 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 Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Sebastian County, Arkansas. 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 |
|---|---|---|---|---|---|
| Enders-Mountainburg complex, 20 to 40 percent slopes | 50K | Well drained | D | Very limited | Very limited |
| Leadvale silt loam, 3 to 8 percent slopes | 44K | Moderately well drained | C/D | Very limited | Very limited |
| Leadvale silt loam, 1 to 3 percent slopes | 43K | Moderately well drained | C/D | Very limited | Very limited |
| Enders-Mountainburg complex, 8 to 20 percent slopes | 31K | Well drained | D | Somewhat limited | Very limited |
| Taft silt loam, 0 to 1 percent slopes | 28K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Mountainburg sandy loam, 3 to 12 percent slopes | 25K | Well drained | D | Very limited | Very limited |
| Mountainburg stony sandy loam, 3 to 12 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Cane fine sandy loam, 3 to 8 percent slopes | 17K | Moderately well drained | C | Very limited | Very limited |
| Wrightsville silt loam, 0 to 2 percent slopes | 11K | Poorly drained | D | Very limited | Very limited |
| Enders stony silt loam, 12 to 30 percent slopes | 9K | Well drained | D | Very limited | Very limited |
| Water | 7K | D | Not rated | Not rated | |
| Linker fine sandy loam, 3 to 8 percent slopes | 7K | Well drained | C | Very limited | Very limited |
| Wrightsville-Messer silt loams complex, 0 to 1 percent slopes | 7K | Poorly drained | D | Very limited | Very limited |
| Mountainburg stony sandy loam, 12 to 35 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Crevasse soils | 6K | Excessively drained | A | Very limited | Very limited |
| Severn silt loam | 4K | Well drained | A | Very limited | Very limited |
| Barling silt loam | 4K | Moderately well drained | C | Very limited | Very limited |
| Muskogee silt loam, 3 to 8 percent slopes | 4K | Moderately well drained | C/D | Very limited | Very limited |
| Pits, quarry | 3K | D | Not rated | Not rated | |
| Sallisaw stony loam, 1 to 8 percent slopes | 3K | Well drained | B | Not limited | Somewhat 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 85% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 94% 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
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.