Yuma-Wellton Area, Parts of Yuma County, Arizona and Imperial County, California
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Entisols — young soils with little profile development, often on floodplains or steep slopes. 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 Yuma-Wellton Area, Parts of Yuma County, Arizona and Imperial County, California. 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 |
|---|---|---|---|---|---|
| Ligurta-Cristobal complex, 2 to 6 percent slopes | 196K | Well drained | C | Somewhat limited | Very limited |
| Harqua-Tremant complex | 117K | Well drained | C | Somewhat limited | Very limited |
| Laposa-Rock outcrop complex, 15 to 75 percent slopes | 100K | Well drained | B | Very limited | Very limited |
| Indio silt loam, 0 to 1 percent slopes | 77K | Well drained | B | Very limited | Very limited |
| Rositas sand | 65K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Indio-Lagunita-Ripley complex | 55K | Well drained | B | Very limited | Somewhat limited |
| Tremant-Rositas complex | 51K | Well drained | C | Somewhat limited | Very limited |
| Superstition sand | 44K | Somewhat excessively drained | A | Not limited | Very limited |
| Carrizo very gravelly sand | 43K | Excessively drained | A | Very limited | Very limited |
| Holtville clay | 30K | Well drained | C | Somewhat limited | Somewhat limited |
| Torriorthents-Torrifluvents complex, 1 to 50 percent slopes | 29K | Well drained | Not rated | Not rated | |
| Gadsden clay | 24K | Well drained | C | Very limited | Very limited |
| Ripley silt loam | 19K | Well drained | B | Not limited | Somewhat limited |
| Cherioni-Rock outcrop complex, 25 to 70 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Antho sandy loam | 17K | Somewhat excessively drained | A | Not limited | Not limited |
| Wellton loamy sand | 16K | Well drained | A | Not limited | Not limited |
| Glenbar silty clay loam | 16K | Well drained | C | Somewhat limited | Very limited |
| Water | 16K | D | Not rated | Not rated | |
| Kofa clay | 13K | Well drained | C | Somewhat limited | Very limited |
| Rositas-Ligurta complex | 13K | Somewhat excessively drained | A | Somewhat 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.
What This Means
Building & Foundations
About 33% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 81% 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.