McMinn County, Tennessee
The most common soil here is Fullerton, on about 22% of the land: a gravelly silt loam, smooth, like flour. Bodine and Coile come next.
About 87% of the land drains well; groundwater comes within two feet of the surface under 7% of it.
USDA rates 72% of the land very limited for a standard septic drain field, and 61% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 15% of the land floods occasionally or more, and bedrock lies within 40 inches under 29% 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 McMinn 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 McMinn 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 |
|---|---|---|---|---|---|
| Fullerton gravelly silt loam, 5 to 12 percent slopes, eroded | 30K | Well drained | B | Somewhat limited | Somewhat limited |
| Fullerton gravelly silt loam, 12 to 25 percent slopes, eroded | 28K | Well drained | B | Very limited | Very limited |
| Coile silt loam, 5 to 12 percent slopes, eroded | 15K | Well drained | D | Very limited | Very limited |
| Bodine gravelly silt loam, 5 to 12 percent slopes, eroded | 11K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Hamblen silt loam, clayey substratum, 0 to 3 percent slopes, occasionally flooded | 10K | Moderately well drained | B/D | Very limited | Very limited |
| Bodine gravelly silt loam 12 to 25 percent slopes, eroded | 10K | Somewhat excessively drained | A | Very limited | Very limited |
| Fullerton gravelly silt loam, 25 to 60 percent slopes, eroded | 9K | Well drained | B | Very limited | Very limited |
| Dewey silty clay loam, 5 to 12 percent slopes, eroded | 8K | Well drained | B | Somewhat limited | Somewhat limited |
| Etowah loam, occasionally flooded, overwash | 8K | Well drained | B | Very limited | Very limited |
| Rockdell gravelly loam, occasionally flooded | 7K | Well drained | A | Very limited | Very limited |
| Corryton-Townley complex, 5 to 12 percent slopes, eroded | 7K | Well drained | C | Somewhat limited | Very limited |
| Coile silt loam, 12 to 25 percent slopes, eroded | 6K | Well drained | D | Very limited | Very limited |
| Red Hills and Steekee soils, 35 to 80 percent slopes, rocky | 6K | Well drained | B | Very limited | Very limited |
| Wolftever silt loam, 1 to 5 percent slopes, occasionally flooded | 6K | Moderately well drained | C | Very limited | Very limited |
| Tellico-Red Hills complex, 25 to 65 percent slopes, rocky | 5K | Well drained | B | Very limited | Very limited |
| Udorthents-Urban land complex, 2 to 12 percent slopes | 5K | Not rated | Not rated | ||
| Apison-Sunlight complex, 25 to 60 percent slopes, very rocky | 5K | Well drained | C | Very limited | Very limited |
| Bloomingdale silty clay loam, occasionally flooded | 5K | Poorly drained | B/D | Very limited | Very limited |
| Dewey silty clay loam, 15 to 25 percent slopes, eroded | 5K | Well drained | B | Very limited | Very limited |
| Corryton-Townley complex, 2 to 5 percent slopes, eroded | 4K | Well drained | C | Not 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 61% 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 72% 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.