Dimmit and Zavala Counties, Texas

Survey Area TX605• Texas

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Dimmit and Zavala Counties, 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
Duval very fine sandy loam, 0 to 3 percent slopes	129K	Well drained	B	Not limited	Somewhat limited
Maverick clay loam, gently undulating	111K	Well drained	D	Very limited	Very limited
Brundage fine sandy loam, frequently flooded, 0 to 1 percent slopes	90K	Moderately well drained	D	Very limited	Very limited
Pryor sandy clay loam, gently undulating	81K	Well drained	C	Very limited	Very limited
Tonio fine sandy loam, gently undulating	76K	Well drained	B	Not limited	Somewhat limited
Webb fine sandy loam, 0 to 3 percent slopes	70K	Well drained	C	Somewhat limited	Very limited
Uvalde silty clay loam, dry, 0 to 2 percent slopes	69K	Well drained	C	Somewhat limited	Very limited
Hindes-Yologo complex, 1 to 8 percent slopes	65K	Well drained	C	Not limited	Very limited
Brystal fine sandy loam, 0 to 3 percent slopes	64K	Well drained	B	Not limited	Somewhat limited
Antosa-Bobillo association, gently undulating	60K	Moderately well drained	C	Somewhat limited	Very limited
Uvalde clay loam, 0 to 1 percent slopes	60K	Well drained	C	Somewhat limited	Very limited
Chacon clay loam, 0 to 3 percent slopes	57K	Well drained	C	Very limited	Very limited
Brundage fine sandy loam, 0 to 1 percent slopes, occasionally flooded	52K	Moderately well drained	D	Very limited	Very limited
Cochina clay, 0 to 1 percent slopes, frequently flooded	50K	Moderately well drained	D	Very limited	Very limited
Catarina clay, 0 to 2 percent slopes	38K	Moderately well drained	D	Very limited	Very limited
Dilley fine sandy loam, gently undulating	38K	Well drained	D	Very limited	Very limited
Montell clay association, 0 to 1 percent slopes	37K	Moderately well drained	D	Very limited	Very limited
Poteet fine sandy loam, frequently flooded	36K	Moderately well drained	C	Very limited	Very limited
Randado fine sandy loam, 0 to 4 percent slopes	35K	Well drained	D	Very limited	Very limited
Cotulla clay, 0 to 3 percent slopes	34K	Moderately 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.

Aridisols

Dry-climate soils with low organic matter. Often have caliche layers that make excavation difficult. Low shrink-swell is good for foundations.

Vertisols

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

What This Means

Building & Foundations

About 52% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 78% 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.