This page summarizes USDA SSURGO mapped soil information for Maricopa County, Arizona.
Coverage measures mapped SSURGO intersection with Census land geometry. It does not mean that every parcel or point has complete soil information.
County summaries provide regional context across mapped soil units. Address lookup combines available public datasets for the Census-matched location.
| Symbol | Map Unit Name | Mapped Acres | % of Mapped Area |
|---|---|---|---|
| 203 | Ustic Haplargids and Typic Torriorthents; cool thermic aridic fan piedmonts | 362,106.48 | 6.13% |
| 201 | Typic Haplargids, Ustic Haplocambids, and Ustic Calciargids; warm thermic basins and fan remnants | 176,008.55 | 2.98% |
| 10 | Growler, Mohall, Tucson, and Valencia, occasionally flooded, dry, 1 to 3 percent slopes | 153,276.39 | 2.6% |
| 21 | Denure-Rillito-Why complex, 1 to 5 percent slopes | 129,021.24 | 2.19% |
| 17 | Hyder, Cipriano, and Rock outcrop, 15 to 65 percent slopes | 104,787.88 | 1.77% |
| 54 | Quilotosa-Rock outcrop complex, 15 to 55 percent slopes | 104,680.2 | 1.77% |
| GgA | Gilman loam, 0 to 1 percent slopes | 100,485.41 | 1.7% |
| 8 | Cherioni-Coolidge complex, 1 to 15 percent slopes | 90,671.33 | 1.54% |
| 34 | Gunsight-Chuckawalla complex, 1 to 15 percent slopes | 85,100.87 | 1.44% |
| 20 | Lomitas, Rock outcrop, and Quilotosa, 15 to 65 percent slopes | 82,414.43 | 1.4% |
| 15 | Gunsight, Rillito, Momoli, and Carrizo, occasionally flooded, 0 to 10 percent slopes | 79,399.47 | 1.34% |
| 37 | Gunsight-Rillito-Carrizo complex, 1 to 15 percent slopes | 77,561.05 | 1.31% |
| RS | Rock outcrop-Cherioni complex | 77,142.17 | 1.31% |
| 9 | Cipriano-Hyder-Rock outcrop complex, 15 to 65 percent slopes | 74,322.64 | 1.26% |
| 100 | Quilotosa-Vaiva-Rock outcrop complex, 20 to 65 percent slopes | 73,581.93 | 1.25% |
| Component | Drainage Class | Hydrologic Group | Estimated Acres | % of Mapped Area |
|---|---|---|---|---|
| Unnamed soils | Unspecified | Unspecified | 622,498.97 | 10.54% |
| Ustic Haplargids | Well drained | C | 302,400.7 | 5.12% |
| Rock outcrop | Unspecified | D | 296,666.02 | 5.02% |
| Gunsight | Somewhat excessively drained, Well drained | B, A | 290,974.71 | 4.93% |
| Gilman | Well drained | C, B, A | 261,043.36 | 4.42% |
| Mohall | Well drained | C | 218,180.56 | 3.7% |
| Rillito | Well drained, Somewhat excessively drained | B, A | 211,745.83 | 3.59% |
| Carrizo | Excessively drained | A | 206,883.75 | 3.5% |
| Laveen | Well drained, Somewhat excessively drained | B, A | 161,159.3 | 2.73% |
| Denure | Somewhat excessively drained, Well drained | B, A | 158,183.2 | 2.68% |
| Antho | Somewhat excessively drained, Well drained | A | 140,473 | 2.38% |
| Quilotosa | Somewhat excessively drained, Excessively drained | D | 140,166.41 | 2.37% |
| Cipriano | Well drained, Somewhat excessively drained | D, B | 139,063.74 | 2.36% |
| Cherioni | Well drained | D | 137,004.06 | 2.32% |
| Momoli | Well drained, Somewhat excessively drained | B, A | 123,923.97 | 2.1% |
Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.