Washington County Area, Utah

Survey Area UT641• Utah

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 Aridisols — dry-climate soils with limited organic matter and often calcium carbonate accumulation. 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 Washington County Area, Utah. 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
Rock outcrop	137K		D	Not rated	Not rated
Rock land	66K			Not rated	Not rated
Cave very gravelly sandy loam, low rainfall, 2 to 7 percent slopes	64K	Well drained	D	Very limited	Very limited
Stony colluvial land	53K			Not rated	Not rated
Badland, very steep	46K			Not rated	Not rated
Badland	44K			Not rated	Not rated
Quazo-Motoqua very gravelly sandy loams, 30 to 70 percent slopes	40K	Well drained	D	Very limited	Very limited
Bond sandy loam, 1 to 10 percent slopes	36K	Well drained	D	Very limited	Very limited
Welring-Tortugas very gravelly loams, 20 to 70 percent slopes	31K	Well drained	D	Very limited	Very limited
Mathis-Rock outcrop complex, 20 to 50 percent slopes	29K	Somewhat excessively drained	A	Very limited	Very limited
Rock land, stony	29K			Not rated	Not rated
Dagflat-Motoqua complex, 30 to 70 percent slopes	24K	Well drained	C	Very limited	Very limited
Magotsu-Pastura complex, 2 to 20 percent slopes	23K	Well drained	D	Very limited	Very limited
Cave very gravelly sandy loam, 7 to 30 percent slopes	22K	Well drained	D	Very limited	Very limited
Eroded land-Shalet complex	20K			Not rated	Not rated
Pintura loamy fine sand, hummocky, 1 to 10 percent slopes	20K	Somewhat excessively drained	A	Not limited	Very limited
Rough broken land	19K			Not rated	Not rated
Eroded land-Shalet complex, warm	14K			Not rated	Not rated
Naplene silt loam, 2 to 6 percent slopes	12K	Well drained	C	Somewhat limited	Very limited
Winkel gravelly fine sandy loam, 1 to 8 percent slopes	11K	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.

Aridisols

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

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

Mollisols

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

What This Means

Building & Foundations

About 37% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 42% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.

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.