McCulloch County, Texas

Survey Area TX307• Texas

The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 McCulloch County, Texas. 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
Tarrant soils, 1 to 8 percent slopes	198K	Well drained	D	Very limited	Very limited
Tarrant-Kavett complex, 0 to 5 percent slopes	40K	Well drained	D	Very limited	Very limited
Rowena clay loam, 1 to 3 percent slopes	40K	Well drained	C	Somewhat limited	Very limited
Mereta clay loam, 1 to 3 percent slopes	36K	Well drained	D	Very limited	Very limited
Owens and Tarrant soils, hilly	31K	Well drained	D	Very limited	Very limited
Cho-Mereta association, gently undulating	30K	Well drained	D	Very limited	Very limited
Rumple gravelly clay loam, 1 to 8 percent slopes	27K	Well drained	D	Very limited	Very limited
Valera clay, 1 to 3 percent slopes	27K	Well drained	C	Very limited	Very limited
Leeray clay, 1 to 3 percent slopes	22K	Well drained	D	Very limited	Very limited
Rowena clay loam, 0 to 1 percent slopes	19K	Well drained	C	Somewhat limited	Very limited
Nuvalde clay loam, 1 to 3 percent slopes	19K	Well drained	C	Somewhat limited	Very limited
Frio soils, 0 to 2 percent slopes, frequently flooded	12K	Well drained	C	Very limited	Very limited
Mereta clay loam, 0 to 2 percent slopes	12K	Well drained	D	Very limited	Very limited
Leeray clay, 0 to 1 percent slopes	11K	Well drained	D	Very limited	Very limited
Brackett-Tarrant association, steep	11K	Well drained	D	Very limited	Very limited
Frio clay loam, 0 to 1 percent slopes, rarely flooded	10K	Well drained	C	Very limited	Very limited
Bonti-Owens complex, 1 to 20 percent slopes, extremely bouldery	8K	Well drained		Not rated	Very limited
Kavett silty clay, 0 to 3 percent slopes	8K	Well drained	D	Very limited	Very limited
Roscoe-Reap complex	7K	Moderately well drained	D	Very limited	Very limited
Yates very flaggy fine sandy loam, 1 to 8 percent slopes, extremely stony	7K	Well drained	D	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.

Mollisols

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

Alfisols

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

Inceptisols

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

Vertisols

High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.

What This Means

Building & Foundations

About 85% 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 100% 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

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.