This page summarizes USDA SSURGO mapped soil information for Pima 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 |
|---|---|---|---|
| 207 | Lithic Argiustolls, Typic Haplustolls, and Aridic Calciustolls; warm mesic ustic mountains | 339,490.02 | 5.77% |
| 7 | Dateland, Wellton, Rillito, Denure, and Rositas, dry, 0 to 5 percent slopes | 141,276.23 | 2.4% |
| 6 | Bucklebar-Hayhook-Tubac complex, 0 to 3 percent slopes | 119,524.63 | 2.03% |
| 12 | Lomitas, Rock outcrop, Quilotosa, and Rizzo, dry, 15 to 65 percent slopes | 107,077.45 | 1.82% |
| 10 | Growler, Mohall, Tucson, and Valencia, occasionally flooded, dry, 1 to 3 percent slopes | 102,953.9 | 1.75% |
| 5 | Coolidge, Denure, and Rillito, dry, 0 to 5 percent slopes | 96,725.27 | 1.64% |
| 25 | Tremant, Casa Grande, and Rositas, rarely flooded, occasionally ponded, dry, 0 to 10 percent slopes | 96,673.73 | 1.64% |
| 204 | Calcic Petrocalcids, Typic Haplocalcids, and Lithic Ustic Torriorthents; cool thermic aridic fan remnants and hills | 94,715.29 | 1.61% |
| 21 | Denure-Rillito-Why complex, 1 to 5 percent slopes | 86,075.54 | 1.46% |
| 6 | Coolidge, Denure, and Rillito, dry, 0 to 5 percent slopes | 83,092.72 | 1.41% |
| 45 | Nahda-Stagecoach complex, 1 to 15 percent slopes | 72,458.94 | 1.23% |
| 44 | Mohall-Trix complex, 0 to 1 percent slopes | 69,425.65 | 1.18% |
| 21 | Lomitas, Rock outcrop, Quilotosa, and Rizzo, dry, 15 to 65 percent slopes | 66,398.2 | 1.13% |
| 24 | Superstition, Rositas, and Tucson, dry, 0 to 10 percent slopes | 65,561.91 | 1.11% |
| 13 | Gunsight, Chuckawalla, and Carrizo, occasionally flooded, dry, 1 to 10 percent slopes | 64,743.68 | 1.1% |
| Component | Drainage Class | Hydrologic Group | Estimated Acres | % of Mapped Area |
|---|---|---|---|---|
| Unnamed soils | Unspecified | Unspecified | 622,944.65 | 10.59% |
| Rock outcrop | Unspecified | D | 291,044.82 | 4.95% |
| Denure | Well drained, Somewhat excessively drained | B, A | 227,849.6 | 3.87% |
| Lithic Argiustolls | Well drained | D | 222,836.95 | 3.79% |
| Rillito | Well drained, Somewhat excessively drained | B, A | 174,720.55 | 2.97% |
| Gunsight | Somewhat excessively drained | B, A | 168,311.91 | 2.86% |
| Mohall | Well drained | C | 131,385.6 | 2.23% |
| Carrizo | Excessively drained | A | 121,709.05 | 2.07% |
| Typic Haplustolls | Well drained | C | 119,570 | 2.03% |
| Quilotosa | Somewhat excessively drained | D | 101,802.28 | 1.73% |
| Coolidge | Well drained | B, A | 101,656.18 | 1.73% |
| Lampshire | Well drained | D | 96,873.13 | 1.65% |
| Rositas | Somewhat excessively drained | A | 95,685.16 | 1.63% |
| Caralampi | Well drained | C | 89,634.2 | 1.52% |
| Dateland | Well drained | B, A | 87,804.02 | 1.49% |
Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.