Maricopa County, Arizona, Central Part
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Maricopa County, Arizona, Central Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Gilman loam, 0 to 1 percent slopes | 100K | Well drained | B | Not limited | Somewhat limited |
| Rock outcrop-Cherioni complex | 81K | D | Not rated | Not rated | |
| Laveen loam, 0 to 1 percent slopes | 76K | Well drained | B | Not limited | Somewhat limited |
| Gunsight-Rillito complex, 0 to 10 percent slopes | 41K | Somewhat excessively drained | B | Not limited | Somewhat limited |
| Cherioni-Rock outcrop complex | 38K | Well drained | D | Very limited | Very limited |
| Antho sandy loam, 0 to 1 percent slopes | 33K | Somewhat excessively drained | A | Not limited | Not limited |
| Mohall clay loam | 32K | Well drained | C | Somewhat limited | Very limited |
| Antho association | 31K | Somewhat excessively drained | A | Not limited | Not limited |
| Antho-Carrizo complex, 0 to 3 percent | 29K | Somewhat excessively drained | A | Not limited | Not limited |
| Estrella loam | 23K | Well drained | C | Very limited | Very limited |
| Harqua-Gunsight complex, 0 to 5 percent slopes | 23K | Well drained | C | Somewhat limited | Very limited |
| Avondale clay loam | 22K | Well drained | C | Not limited | Somewhat limited |
| Glenbar clay loam, 0 to 2 percent slopes | 22K | Well drained | C | Very limited | Very limited |
| Gilman fine sandy loam, 0 to 2 percent slopes | 20K | Well drained | A | Very limited | Very limited |
| Gilman-Antho association | 19K | Well drained | B | Not limited | Somewhat limited |
| Mohall loam MLRA 40 | 19K | Well drained | C | Not limited | Very limited |
| Laveen sandy loam | 18K | Well drained | B | Not limited | Somewhat limited |
| Carrizo and Brios soils | 17K | Excessively drained | A | Very limited | Very limited |
| Gunsight-Pinal complex, 1 to 10 percent slopes | 17K | Somewhat excessively drained | B | Not limited | Somewhat limited |
| Gilman loam, saline-alkali | 17K | Well drained | B | Not limited | Somewhat 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 28% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
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.