Soil survey area

Tulare County, California, Central Part

Survey Area CA660• California
The short version

The most common soil here is Blasingame, on about 9% of the land: a loam, a balanced mix that crumbles in your hand. Auberry and Centerville come next.

About 86% of the land drains well.

USDA rates 94% of the land very limited for a standard septic drain field, and 87% very limited for homes with basements. That means extra cost or special design, not that it can't be done.

Worth knowing: bedrock lies within 40 inches under 57% 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 ground underfoot

The soils you're most likely standing on

The biggest named soils in Tulare County, California, Central Part, each drawn five feet deep from its official USDA description, in its recorded colors.

Blasingame
9% of the area
Loam topsoil · well drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Alfisols
Auberry
7% of the area
Coarse sandy loam topsoil · well drained
Gritty and crumbly. Drains fast and warms early in spring.
Alfisols
Centerville
6% of the area
Clay topsoil · well drained
Sticky when wet and rock-hard when dry. Drains slowly.
Vertisols
San Joaquin
5% of the area
Loam topsoil · moderately well drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Alfisols
Porterville
4% of the area
Clay topsoil · well drained
Sticky when wet and rock-hard when dry. Drains slowly.
Vertisols
Cieneba
4% of the area
Gravelly loam topsoil · somewhat excessively drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Entisols

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 C (slow infiltration, moderate 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 Tulare County, California, Central Part. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Blasingame-Rock outcrop complex, 9 to 50 percent slopes 77K Well drainedCVery limitedVery limited
Auberry-Rock outcrop complex, 9 to 50 percent slopes 65K Well drainedCVery limitedVery limited
Cieneba-Rock outcrop complex, 15 to 75 percent slopes 61K Somewhat excessively drainedDVery limitedVery limited
Vista-Rock outcrop complex, 9 to 50 percent slopes 38K Well drainedBVery limitedVery limited
Friant-Rock outcrop complex, 15 to 75 percent slopes 37K Well drainedDVery limitedVery limited
Cibo-Rock outcrop complex, 15 to 50 percent slopes 33K Well drainedDVery limitedVery limited
San Joaquin loam, 0 to 2 percent slopes 32K Moderately well drainedCVery limitedVery limited
Centerville clay, 2 to 9 percent slopes 32K Well drainedDVery limitedVery limited
Blasingame sandy loam, 15 to 30 percent slopes 23K Well drainedCVery limitedVery limited
Coarsegold loam, 30 to 50 percent slopes 21K Well drainedCVery limitedVery limited
Porterville clay, 2 to 9 percent slopes 18K Well drainedCVery limitedVery limited
San Joaquin loam, 2 to 9 percent slopes 18K Moderately well drainedCVery limitedVery limited
Exeter loam, 0 to 2 percent slopes 17K Well drainedCVery limitedVery limited
Blasingame sandy loam, 30 to 50 percent slopes 17K Well drainedCVery limitedVery limited
Holland-Rock outcrop complex, 15 to 50 percent slopes 15K BNot ratedNot rated
Auberry sandy loam, 30 to 50 percent slopes 14K Well drainedBVery limitedVery limited
Crouch-Rock outcrop complex, 15 to 50 percent slopes 12K ANot ratedNot rated
Auberry sandy loam, 15 to 30 percent slopes 12K Well drainedCVery limitedVery limited
Sheephead-Rock outcrop complex, 15 to 75 percent slopes 12K Somewhat excessively drainedDVery limitedVery limited
Porterville clay, 0 to 2 percent slopes 12K Well drainedCVery limitedVery 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.
Vertisols
High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.
Inceptisols
Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.
Mollisols
Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

What This Means

Building & Foundations

About 87% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.

Septic Systems

About 94% 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.

Look Up a Specific Address

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