Cobb County, Georgia
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Cobb County, Georgia.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Gwinnett clay loam, 6 to 10 percent slopes, severely eroded | 13K | Well drained | B | Not limited | Somewhat limited |
| Madison and Pacolet soils, 10 to 15 percent slopes, severely eroded | 13K | Well drained | B | Somewhat limited | Somewhat limited |
| Madison clay loam, 6 to 10 percent slopes, severely eroded | 12K | Well drained | B | Not limited | Somewhat limited |
| Madison and Pacolet soils, 15 to 25 percent slopes, eroded | 12K | Well drained | B | Very limited | Very limited |
| Cartecay fine sandy loam, 0 to 2 percent slopes, frequently flooded | 10K | Somewhat poorly drained | A/D | Very limited | Very limited |
| Madison sandy loam, 2 to 6 percent slopes, moderately eroded | 9K | Well drained | B | Not limited | Somewhat limited |
| Appling sandy loam, 6 to 10 percent slopes | 9K | Well drained | B | Not limited | Somewhat limited |
| Gwinnett clay loam, 10 to 15 percent slopes, severely eroded | 8K | Well drained | B | Somewhat limited | Somewhat limited |
| Toccoa sandy loam, 0 to 2 percent slopes, occasionally flooded | 8K | Moderately well drained | A | Very limited | Very limited |
| Cecil sandy loam, 2 to 6 percent slopes, moderately eroded | 7K | Well drained | B | Not limited | Somewhat limited |
| Appling sandy loam, 2 to 6 percent slopes | 7K | Well drained | B | Not limited | Somewhat limited |
| Gwinnett clay loam, 2 to 6 percent slopes, severely eroded | 6K | Well drained | B | Not limited | Somewhat limited |
| Musella and Pacolet stony soils, 10 to 45 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Madison sandy loam, 6 to 10 percent slopes, eroded | 6K | Well drained | B | Not limited | Somewhat limited |
| Cecil sandy loam, 6 to 10 percent slopes, moderately eroded | 6K | Well drained | B | Not limited | Somewhat limited |
| Madison sandy loam, 10 to 15 percent slopes, eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Gwinnett clay loam, 15 to 25 percent slopes, eroded | 4K | Well drained | B | Very limited | Very limited |
| Madison clay loam, 15 to 25 percent slopes, severely eroded | 4K | Well drained | B | Very limited | Very limited |
| Pacolet sandy clay loam, 6 to 10 percent slopes, severely eroded | 4K | Well drained | B | Not limited | Somewhat limited |
| Louisa soils, 25 to 60 percent slopes | 4K | Somewhat excessively drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 31% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 31% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
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.