Davison County, South Dakota
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). 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 Davison County, South Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Houdek-Prosper loams, 0 to 2 percent slopes | 67K | Well drained | C | Somewhat limited | Very limited |
| Clarno-Ethan-Bonilla loams, 1 to 6 percent slopes | 39K | Well drained | B | Not limited | Very limited |
| Clarno-Bonilla loams, 0 to 2 percent slopes | 36K | Well drained | B | Not limited | Very limited |
| Houdek-Stickney complex, 0 to 2 percent slopes | 34K | Well drained | C | Somewhat limited | Very limited |
| Tetonka silt loam, 0 to 1 percent slopes | 16K | Poorly drained | C/D | Very limited | Very limited |
| Enet loam, 0 to 2 percent slopes | 12K | Well drained | B | Not limited | Very limited |
| Clarno-Ethan-Bonilla loams, 2 to 9 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Betts-Ethan loams, 15 to 40 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Bon loam, channeled, 0 to 2 percent slopes, frequently flooded | 6K | Moderately well drained | C | Very limited | Very limited |
| Blendon sandy loam, 0 to 3 percent slopes | 6K | Well drained | A | Not limited | Very limited |
| Stickney-Dudley silt loams, 0 to 2 percent slopes | 5K | Moderately well drained | D | Somewhat limited | Very limited |
| Salmo silt loam | 4K | Poorly drained | B/D | Very limited | Very limited |
| Beadle-Dudley complex, 0 to 2 percent slopes | 4K | Well drained | C | Somewhat limited | Very limited |
| Ethan-Betts loams, 9 to 15 percent slopes | 4K | Well drained | C | Somewhat limited | Very limited |
| Lamo silt loam | 3K | Somewhat poorly drained | C | Very limited | Very limited |
| Hand-Davison loams, 0 to 3 percent slopes | 3K | Well drained | B | Not limited | Somewhat limited |
| Clamo silty clay loam | 2K | Poorly drained | C/D | Very limited | Very limited |
| Storla loam, 0 to 2 percent slopes | 2K | Somewhat poorly drained | C | Very limited | Very limited |
| Ethan-Betts loams, 5 to 9 percent slopes, eroded | 2K | Well drained | B | Somewhat limited | Very limited |
| Lamo and Prosper soils, 0 to 3 percent slopes | 2K | Somewhat poorly drained | C | Very limited | Very 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 98% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
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.