DeKalb County, Alabama
The most common soil here is Hartsells, on about 20% of the land: a fine sandy loam, gritty and crumbly. Paleudults and Wynnville come next.
About 79% of the land drains well, and 4% stays wet for long stretches; groundwater comes within two feet of the surface under 19% of it.
USDA rates 93% of the land very limited for a standard septic drain field, and 86% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 3% of the land floods occasionally or more, and bedrock lies within 40 inches under 45% 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 DeKalb County, Alabama, 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 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 DeKalb County, Alabama. 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 |
|---|---|---|---|---|---|
| Hartsells fine sandy loam, 6 to 10 percent slopes, moderately eroded | 93K | Well drained | C | Very limited | Very limited |
| Wynnville-Nauvoo fine sandy loams, 2 to 6 percent slopes, eroded | 72K | Moderately well drained | C/D | Very limited | Very limited |
| Stony colluvial land, steep | 60K | Well drained | B | Very limited | Very limited |
| Rockland, sandstone, steep | 17K | Well drained | D | Very limited | Very limited |
| Muskingum (Gorgas) stony fine sandy loam, 10 to 20 percent slopes, very stony | 15K | Well drained | D | Very limited | Very limited |
| Clarksville cherty silt loam, steep | 12K | Somewhat excessively drained | A | Very limited | Very limited |
| Muskingum (Gorgas) stony fine sandy loam, 5 to 10 percent slopes, very stony | 10K | Well drained | D | Very limited | Very limited |
| Hartsells fine sandy loam, 6 to 10 percent slopes, shallow | 8K | Well drained | C | Very limited | Very limited |
| Gorgas sandy loam, 6 to 10 percent slopes, moderately eroded, rocky | 7K | Well drained | D | Very limited | Very limited |
| Clarksville cherty silty clay loam, severely eroded, steep | 7K | Somewhat excessively drained | A | Very limited | Very limited |
| Clarksville cherty silt loam, hilly | 7K | Somewhat excessively drained | A | Very limited | Very limited |
| Fullerton cherty silt loam, hilly | 7K | Well drained | B | Very limited | Very limited |
| Fullerton gravelly silt loam, 5 to 12 percent slopes | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Apison (Townley) loam, 5 to 10 percent slopes, eroded | 6K | Well drained | D | Somewhat limited | Very limited |
| Apison (Townley) loam, 5 to 10 percent slopes | 6K | Well drained | D | Somewhat limited | Very limited |
| Atkins silt loam | 6K | Poorly drained | B/D | Very limited | Very limited |
| Clarksville cherty silt loam, eroded, rolling | 6K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Fullerton cherty loam, eroded, rolling | 6K | Well drained | B | Somewhat limited | Somewhat limited |
| Hartsells-Nauvoo complex, 2 to 6 percent slopes, moderately eroded | 5K | Well drained | C | Very limited | Very limited |
| Apison (Townley) loam, 2 to 5 percent slopes, eroded | 5K | Well drained | D | Somewhat 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 86% 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 93% 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.