This page summarizes USDA SSURGO mapped soil information for Ada County, Idaho.
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 |
|---|---|---|---|
| ANS | Area not surveyed, access denied | 31,911.48 | 4.7% |
| 61 | Typic Haplargids and Lithic Haplargids; thermic hills and mountains | 7,125.89 | 1.05% |
| 15 | Torriorthents, Torripsamments, and Haplargids; hyperthermic fan piedmonts | 5,543.68 | 0.82% |
| 29 | Lithic Torriorthents and Ustic Haplargids, shallow; mesic hills and mountains | 4,654.12 | 0.69% |
| 21 | Lithic Torriorthents, Typic Haplocalcids, and Rock outcrop; hyperthermic hills and mountains | 3,844.08 | 0.57% |
| 8215 | Clanalpine-Segura-Cleavage association | 3,020.01 | 0.44% |
| 8230 | Stopatoe-Scuffe-Notstew association | 2,190.1 | 0.32% |
| 45 | Typic Torriorthents and Typic Haplargids; thermic fan piedmonts | 1,993.65 | 0.29% |
| 24 | Torripsamments and Torriorthents; hyperthermic dunes and alluvium | 1,753.62 | 0.26% |
| 23 | Torriorthents and Torripsamments; hyperthermic basins | 1,683.78 | 0.25% |
| 100 | Pookaloo-Cavehill-Rock outcrop association | 1,672.47 | 0.25% |
| SHB | Shano silt loam, 0 to 5 percent slopes | 1,453.61 | 0.21% |
| 3226 | Stewval-Bellehelen-Rock outcrop association | 1,429.04 | 0.21% |
| 1594 | Boton complex | 1,372.95 | 0.2% |
| 282 | Palinor very gravelly loam, 2 to 15 percent slopes | 1,290.46 | 0.19% |
| Component | Drainage Class | Hydrologic Group | Estimated Acres | % of Mapped Area |
|---|---|---|---|---|
| AREA NOT SURVEYED | Unspecified | Unspecified | 31,996.49 | 4.71% |
| Rock outcrop | Excessively drained, Well drained | D | 19,461.01 | 2.87% |
| Unnamed | Somewhat poorly drained, Poorly drained | C/D | 7,588.92 | 1.12% |
| Water | Subaqueous | D | 6,020.46 | 0.89% |
| Lithic Torriorthents | Well drained, Excessively drained, Somewhat excessively drained | D | 5,949.48 | 0.88% |
| Typic Udorthents | Somewhat poorly drained | B/D, C/D, D | 5,315.02 | 0.78% |
| Stewval | Well drained | D | 5,263.28 | 0.78% |
| Palinor | Well drained | D | 4,675.06 | 0.69% |
| Playas | Somewhat poorly drained, Poorly drained, Very poorly drained, Well drained | D | 4,597.64 | 0.68% |
| Cleavage | Well drained | D | 4,016.19 | 0.59% |
| Torripsamments | Excessively drained, Somewhat excessively drained | A | 3,911.38 | 0.58% |
| Typic Haplargids | Well drained | C, A, D, B | 3,863.85 | 0.57% |
| Unsel | Well drained | C | 3,540.29 | 0.52% |
| Torriorthents | Somewhat excessively drained, Excessively drained, Well drained | B, A, D | 3,432.42 | 0.51% |
| Chiara | Well drained | D | 3,261.87 | 0.48% |
Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.