Gila Bend-Ajo Area, Arizona, Parts of Maricopa and Pima Counties
The dominant drainage class is Somewhat excessively drained and the dominant hydrologic group is A (high infiltration, low 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 Gila Bend-Ajo Area, Arizona, Parts of Maricopa and Pima Counties.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Denure-Rillito-Why complex, 1 to 5 percent slopes | 162K | Somewhat excessively drained | A | Not limited | Not limited |
| Cipriano-Hyder-Rock outcrop complex, 15 to 65 percent slopes | 112K | D | Very limited | Very limited | |
| Quilotosa-Rock outcrop complex, 15 to 55 percent slopes | 110K | Somewhat excessively drained | D | Very limited | Very limited |
| Gunsight-Rillito-Carrizo complex, 1 to 15 percent slopes | 106K | Somewhat excessively drained | A | Not limited | Not limited |
| Gunsight-Chuckawalla complex, 1 to 15 percent slopes | 90K | Somewhat excessively drained | A | Not limited | Not limited |
| Cherioni-Coolidge complex, 1 to 15 percent slopes | 81K | Well drained | D | Very limited | Very limited |
| Gunsight-Cipriano complex, 1 to 15 percent slopes | 67K | Somewhat excessively drained | B | Not limited | Somewhat limited |
| Dateland-Cuerda complex, 0 to 3 percent slopes | 54K | Well drained | B | Not limited | Somewhat limited |
| Hyder-Gachado-Gunsight extremely gravelly sandy loams, 1 to 25 percent slopes | 43K | Somewhat excessively drained | D | Very limited | Very limited |
| Rock outcrop-Hyder complex, 25 to 65 percent slopes | 42K | D | Not rated | Not rated | |
| Carrizo-Momoli complex, 0 to 3 percent slopes | 38K | Excessively drained | A | Very limited | Very limited |
| Cherioni very cobbly fine sandy loam, 3 to 10 percent slopes | 34K | Well drained | D | Very limited | Very limited |
| Mohall complex, 0 to 3 percent slopes | 32K | Well drained | C | Somewhat limited | Very limited |
| Coolidge complex, 0 to 3 percent slopes | 31K | Well drained | B | Not limited | Not limited |
| Denure-Coolidge complex, 1 to 3 percent slopes | 28K | Somewhat excessively drained | A | Not limited | Not limited |
| Riverwash | 27K | Not rated | Not rated | ||
| Cipriano-Momoli complex, 1 to 7 percent slopes | 25K | Somewhat excessively drained | D | Not limited | Very limited |
| Gunsight-Pinamt complex, 1 to 15 percent slopes | 24K | Somewhat excessively drained | A | Not limited | Not limited |
| Denure-Why complex, 1 to 5 percent slopes | 24K | Somewhat excessively drained | A | Not limited | Not limited |
| Growler-Wellton complex, 1 to 3 percent slopes | 22K | Somewhat excessively drained | B | Not limited | Not limited |
What This Means
Building & Foundations
About 36% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 41% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
Gardening & Agriculture
Soils tend to drain very quickly, meaning nutrients and water don't stick around long. Raised beds with amended soil, drip irrigation, and heavy mulching will give the best results. Compost is your best friend here — it improves water retention dramatically.