Hamilton County, Tennessee
The most common soil here is Fullerton, on about 16% of the land: a gravelly silt loam, smooth, like flour. Bodine and Lily come next.
About 69% of the land drains well, and 2% stays wet for long stretches; groundwater comes within two feet of the surface under 6% of it.
USDA rates 74% of the land very limited for a standard septic drain field, and 69% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 8% of the land floods occasionally or more, and bedrock lies within 40 inches under 27% 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 Hamilton County, Tennessee, 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 B (moderate infiltration). 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 Hamilton County, Tennessee. 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 |
|---|---|---|---|---|---|
| Water | 23K | Not rated | Not rated | ||
| Bouldin-Gilpin complex, 20 to 60 percent slopes | 22K | Well drained | A | Very limited | Very limited |
| Fullerton-Urban land complex, 3 to 40 percent slopes | 22K | Very limited | Very limited | ||
| Fullerton gravelly silt loam, 15 to 25 percent slopes | 20K | Well drained | B | Very limited | Very limited |
| Bodine cherty silt loam, 25 to 45 percent slopes | 17K | Somewhat excessively drained | A | Very limited | Very limited |
| Fullerton cherty silt loam, 25 to 40 percent slopes | 17K | Well drained | B | Very limited | Very limited |
| Fullerton gravelly silt loam, 5 to 12 percent slopes | 15K | Well drained | B | Somewhat limited | Somewhat limited |
| Bodine cherty silt loam, 5 to 12 percent slopes | 14K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Colbert-Urban land complex, 2 to 12 percent slopes | 12K | D | Not rated | Not rated | |
| Ramsey-Rock outcrop complex, 15 to 70 percent slopes | 11K | Somewhat excessively drained | D | Very limited | Very limited |
| Lily loam, 6 to 12 percent slopes | 10K | Well drained | B | Very limited | Very limited |
| Colbert silt loam, 2 to 12 percent slopes | 9K | Moderately well drained | D | Very limited | Very limited |
| Lily loam, 2 to 6 percent slopes | 8K | Well drained | B | Very limited | Very limited |
| Roane cherty silt loam, 2 to 6 percent slopes | 7K | Moderately well drained | D | Very limited | Very limited |
| Armuchee silt loam, 10 to 25 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Etowah silt loam, 2 to 6 percent slopes | 6K | Well drained | B | Not limited | Somewhat limited |
| Lily loam, 12 to 20 percent slopes | 6K | Well drained | B | Very limited | Very limited |
| Ramsey loam, 8 to 25 percent slopes | 6K | Somewhat excessively drained | D | Very limited | Very limited |
| Enders silt loam, 2 to 12 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Arents | 5K | Not rated | Not rated |
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 69% 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 74% 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.