Williamson County, Tennessee

Survey Area TN187• Tennessee

The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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. 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
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

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.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Ultisols

Strongly weathered clay soils of the Southeast. Acidic and naturally low in nutrients. Clay subsoil can slow drainage.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

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.