Willcox Area, Arizona Parts of Cochise and Graham Counties
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). 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 Willcox Area, Arizona Parts of Cochise and Graham Counties.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 36K | D | Not rated | Not rated | |
| Tubac sandy clay loam, 0 to 2 percent slopes | 33K | Well drained | C | Somewhat limited | Very limited |
| Pima loam | 31K | Well drained | C | Not limited | Very limited |
| Gothard fine sandy loam | 31K | Moderately well drained | C | Somewhat limited | Very limited |
| Tubac sandy loam, 0 to 2 percent slopes | 20K | Well drained | C | Somewhat limited | Very limited |
| Crot sandy loam | 19K | Somewhat poorly drained | D | Very limited | Very limited |
| Sonoita sandy loam, 0 to 2 percent slopes | 19K | Well drained | A | Not limited | Not limited |
| Karro loam | 16K | Well drained | C | Somewhat limited | Very limited |
| Grabe loam | 15K | Well drained | C | Not limited | Very limited |
| McAllister loam | 13K | Well drained | C | Somewhat limited | Very limited |
| Elfrida silty clay loam | 13K | Well drained | C | Somewhat limited | Very limited |
| Forrest loam, 0 to 2 percent slopes | 11K | Well drained | C | Somewhat limited | Very limited |
| Guest clay loam | 11K | Well drained | C | Very limited | Very limited |
| Grabe sandy loam | 10K | Well drained | C | Not limited | Very limited |
| Comoro sandy loam, 0 to 2 percent slopes | 10K | Well drained | A | Not limited | Very limited |
| Stewart loam | 8K | Somewhat poorly drained | D | Not limited | Very limited |
| Cogswell clay loam | 8K | Well drained | C | Somewhat limited | Very limited |
| Frye sandy loam | 5K | Well drained | D | Very limited | Very limited |
| Torriorthents, hummocky | 5K | Excessively drained | Not rated | Not rated | |
| Duncan loam | 5K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
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
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.