Winnebago County, Iowa
The dominant drainage class is Poorly drained and the dominant hydrologic group is C/D (varies with drainage). 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 Winnebago County, Iowa.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Canisteo clay loam, 0 to 2 percent slopes | 43K | Poorly drained | C/D | Very limited | Very limited |
| Nicollet clay loam, 1 to 3 percent slopes | 26K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Clarion loam, 2 to 6 percent slopes | 22K | Moderately well drained | C | Somewhat limited | Very limited |
| Webster clay loam, 0 to 2 percent slopes | 21K | Poorly drained | C/D | Very limited | Very limited |
| Clarion loam, 6 to 10 percent slopes, moderately eroded | 15K | Well drained | B | Somewhat limited | Somewhat limited |
| Okoboji silty clay loam, 0 to 1 percent slopes | 13K | Very poorly drained | C/D | Very limited | Very limited |
| Harps clay loam, 0 to 2 percent slopes | 10K | Poorly drained | C/D | Very limited | Very limited |
| Clarion-Storden complex, 6 to 10 percent slopes, moderately eroded | 6K | Well drained | B | Somewhat limited | Somewhat limited |
| Klossner muck, 0 to 1 percent slopes | 5K | Very poorly drained | C/D | Very limited | Very limited |
| Okoboji mucky silt loam, 0 to 1 percent slopes | 5K | Very poorly drained | C/D | Very limited | Very limited |
| Omsrud-Storden complex, 10 to 16 percent slopes, moderately eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Houghton muck, 0 to 1 percent slopes | 4K | Very poorly drained | A/D | Very limited | Very limited |
| Waldorf silty clay loam, 0 to 2 percent slopes | 4K | Poorly drained | C/D | Very limited | Very limited |
| Spillville loam, 2 to 5 percent slopes | 4K | Moderately well drained | C | Somewhat limited | Very limited |
| Muskego soils, 0 to 1 percent slopes | 4K | Very poorly drained | C/D | Very limited | Very limited |
| Kilkenny clay loam, 6 to 10 percent slopes, moderately eroded | 4K | Moderately well drained | D | Somewhat limited | Very limited |
| Lester loam, 6 to 10 percent slopes, moderately eroded | 4K | Well drained | C | Somewhat limited | Very limited |
| Reedslake-Le Sueur complex, 1 to 6 percent slopes | 3K | Moderately well drained | C | Very limited | Very limited |
| Clarion-Swanlake complex, 2 to 6 percent slopes | 3K | Moderately well drained | C | Somewhat limited | Very limited |
| Mayer loam, 0 to 2 percent slopes | 3K | Poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 69% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas. A geotechnical assessment is recommended before building.
Septic Systems
About 87% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.