Williamson County, Tennessee
The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). 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 Williamson County, Tennessee.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Bodine gravelly silt loam, 20 to 40 percent slopes | 32K | Somewhat excessively drained | A | Very limited | Very limited |
| Rockland | 28K | Very limited | Very limited | ||
| Huntington silt loam, phosphatic | 16K | Well drained | B | Very limited | Very limited |
| Lindell silt loam, 0 to 2 percent slopes, occasionally flooded | 14K | Moderately well drained | B/D | Very limited | Very limited |
| Egam silt loam, phosphatic | 11K | Well drained | C | Very limited | Very limited |
| Armour silt loam, 2 to 5 percent slopes, eroded | 10K | Well drained | B | Not limited | Somewhat limited |
| Stiversville silt loam, 5 to 12 percent slopes, eroded | 10K | Well drained | A | Somewhat limited | Very limited |
| Mountview silt loam, shallow, 5 to 12 percent slopes, eroded | 9K | Well drained | B | Somewhat limited | Somewhat limited |
| Maury silt loam, 2 to 5 percent slopes, eroded | 9K | Well drained | A | Not limited | Very limited |
| Mountview silt loam, shallow, 5 to 12 percent slopes | 8K | Well drained | B | Somewhat limited | Somewhat limited |
| Sulphura channery silt loam, 25 to 55 percent slopes | 7K | Somewhat excessively drained | B | Very limited | Very limited |
| Armour silt loam, 2 to 5 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Sengtown gravelly silt loam, 12 to 20 percent slopes | 7K | Well drained | B | Very limited | Very limited |
| Bodine gravelly silt loam, 5 to 12 percent slopes | 7K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Bodine gravelly silt loam, 12 to 20 percent slopes | 7K | Somewhat excessively drained | A | Very limited | Very limited |
| Ashwood-Mimosa-Rock outcrop complex, 5 to 15 percent slopes | 7K | Well drained | D | Very limited | Very limited |
| Stiversville silt loam, 2 to 5 percent slopes | 6K | Well drained | A | Not limited | Very limited |
| Dellrose gravelly silt loam, 20 to 30 percent slopes, eroded | 6K | Well drained | B | Very limited | Very limited |
| Greendale cherty silt loam, 2 to 12 percent slopes | 6K | Well drained | B | Somewhat limited | Somewhat limited |
| Huntington cherty silt loam, phosphatic | 5K | Well drained | A | Very limited | Very limited |
What This Means
Building & Foundations
About 66% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 84% 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.