San Simon Area Parts of Cochise Graham and Greenlee Counties, Arizona
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 San Simon Area Parts of Cochise Graham and Greenlee Counties, Arizona.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Tres Hermanos gravelly loam | 115K | Well drained | C | Not limited | Somewhat limited |
| Atascosa-Graham-Rock outcrop complex | 106K | Well drained | D | Very limited | Very limited |
| Atascosa-Chiricahua-Rock outcrop complex | 72K | Well drained | D | Very limited | Very limited |
| Graham-Rock outcrop complex | 66K | Well drained | D | Very limited | Very limited |
| Continental-Tubac complex | 59K | Well drained | C | Somewhat limited | Very limited |
| Sonoita gravelly sandy loam | 51K | Well drained | A | Not limited | Somewhat limited |
| Pima-Grabe association | 50K | Well drained | C | Very limited | Very limited |
| Tubac soils | 49K | Well drained | C | Very limited | Very limited |
| Eba gravelly sandy loam | 46K | Well drained | C | Somewhat limited | Very limited |
| Comoro soils | 40K | Well drained | A | Very limited | Somewhat limited |
| White House-Forrest association | 39K | Well drained | C | Very limited | Very limited |
| Artesia cobbly fine sandy loam | 33K | Well drained | C | Somewhat limited | Very limited |
| Signal gravelly loam | 30K | Well drained | C | Somewhat limited | Very limited |
| Hondale complex | 30K | Well drained | D | Very limited | Very limited |
| Glendale-Gila complex, eroded | 30K | Well drained | C | Very limited | Very limited |
| Mokiak-Faraway-Rock outcrop complex | 28K | Well drained | C | Very limited | Very limited |
| Anthony-Gila complex | 28K | Well drained | A | Very limited | Very limited |
| Tubac-Sonoita complex | 28K | Well drained | C | Very limited | Very limited |
| Bluepoint-Gothard complex | 24K | Somewhat excessively drained | A | Very limited | Very limited |
| Cave-Durorthids complex | 23K | Well drained | D | Not limited | Very limited |
What This Means
Building & Foundations
About 62% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, 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
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.