Union County, Tennessee
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 Union County, Tennessee.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Clarksville cherty silt loam, steep phase | 23K | Somewhat excessively drained | A | Very limited | Very limited |
| Berks-Weikert complex, 20 to 75 percent slopes | 22K | Well drained | B | Very limited | Very limited |
| Water | 14K | Not rated | Not rated | ||
| Fullerton cherty silt loam, steep phase | 11K | Well drained | B | Very limited | Very limited |
| Fullerton gravelly silt loam, 15 to 25 percent slopes | 10K | Well drained | B | Very limited | Very limited |
| Rough stony land, talbott soil material | 10K | Very limited | Very limited | ||
| Clarksville cherty silt loam, hilly phase | 6K | Somewhat excessively drained | A | Very limited | Very limited |
| Montevallo shaly silt loam, steep phase | 5K | Well drained | D | Very limited | Very limited |
| Fullerton gravelly silt loam, 5 to 12 percent slopes, cool | 4K | Well drained | B | Somewhat limited | Somewhat limited |
| Rough stony land, Fullerton soil material | 4K | Very limited | Very limited | ||
| Clarksville cherty silt loam, rolling phase | 4K | Somewhat excessively drained | A | Somewhat limited | Somewhat limited |
| Armuchee silt loam, hilly phase | 4K | Well drained | C | Very limited | Very limited |
| Armuchee silt loam, steep phase | 3K | Well drained | C | Very limited | Very limited |
| Fullerton silt loam, 5 to 12 percent slopes, cool (cr-sil) | 3K | Well drained | B | Somewhat limited | Somewhat limited |
| Claiborne silt loam, hilly phase | 2K | Well drained | B | Very limited | Very limited |
| Philo fine sandy loam (sl) | 2K | Moderately well drained | C | Very limited | Very limited |
| Claiborne silt loam, steep phase | 2K | Well drained | B | Very limited | Very limited |
| Talbott silty clay loam, eroded rolling phase | 2K | Well drained | C | Very limited | Very limited |
| Sequoia silty clay loam, eroded rolling phase | 2K | Well drained | C | Somewhat limited | Very limited |
| Leadvale silt loam, rolling phase | 2K | Moderately well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 80% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 81% 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.