This page summarizes USDA SSURGO mapped soil information for Polk County, Iowa.
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 |
|---|---|---|---|
| I123A | Bearden-Colvin silty clay loams, 0 to 2 percent slopes | 9,494.62 | 2.51% |
| 17 | Smyrna and Myakka fine sands | 7,251.65 | 1.92% |
| PfB | Pinetucky fine sandy loam, 1 to 5 percent slopes | 6,998.35 | 1.85% |
| HatA | Hatliff-Pluck-Kian complex, 0 to 1 percent slopes, frequently flooded | 6,930.9 | 1.83% |
| 3864 | Hastings silt loam, 0 to 1 percent slopes | 5,672.02 | 1.5% |
| 99 | Water | 5,262.33 | 1.39% |
| I666A | Colvin-Perella silty clay loams, 0 to 1 percent slopes | 5,008.83 | 1.32% |
| 3 | Candler sand, 0 to 5 percent slopes | 4,885.41 | 1.29% |
| 7 | Pomona fine sand | 4,588.47 | 1.21% |
| DoB | Doucette loamy fine sand, 1 to 5 percent slopes | 3,355.59 | 0.89% |
| W | Water | 3,255.42 | 0.86% |
| 31D | Sherless-Littlefir complex, 8 to 15 percent slopes, stony | 3,101.64 | 0.82% |
| WoD | Woodville fine sandy loam, 5 to 12 percent slopes | 3,068.56 | 0.81% |
| 13 | Samsula muck, frequently ponded, 0 to 1 percent slopes | 2,700.52 | 0.71% |
| 15 | Tavares fine sand, 0 to 5 percent slopes | 2,689.79 | 0.71% |
| Component | Drainage Class | Hydrologic Group | Estimated Acres | % of Mapped Area |
|---|---|---|---|---|
| Water | Subaqueous | D | 13,743.65 | 3.63% |
| Colvin | Very poorly drained, Poorly drained | C/D, B/D | 8,087.36 | 2.14% |
| Bearden | Somewhat poorly drained | C | 7,529.83 | 1.99% |
| Pinetucky | Moderately well drained | C | 7,159.26 | 1.89% |
| Hastings | Well drained | C | 6,492.41 | 1.71% |
| Sherless | Well drained | C | 6,255.07 | 1.65% |
| Woodville | Somewhat poorly drained | D | 5,462.56 | 1.44% |
| Candler | Excessively drained | A | 5,083.59 | 1.34% |
| Fullerton | Well drained | B | 4,830.2 | 1.28% |
| Smyrna | Poorly drained | A/D | 4,340.33 | 1.15% |
| Pomona | Poorly drained | A/D | 4,291.78 | 1.13% |
| Rosholt | Well drained | B, A | 3,828.43 | 1.01% |
| Myakka | Very poorly drained, Poorly drained | A/D | 3,792.53 | 1% |
| Clarion | Well drained | B | 3,545.68 | 0.94% |
| Shack | Well drained | C | 3,473.79 | 0.92% |
Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.