Jefferson County, Iowa
The dominant drainage class is Poorly drained and the dominant hydrologic group is D (very slow infiltration, high 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 Jefferson County, Iowa.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Taintor silty clay loam, 0 to 2 percent slopes | 15K | Poorly drained | D | Very limited | Very limited |
| Haig silt loam, 0 to 2 percent slopes | 15K | Poorly drained | D | Very limited | Very limited |
| Mahaska silty clay loam, 2 to 5 percent slopes | 13K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Rinda silty clay loam, 5 to 9 percent slopes, moderately eroded | 11K | Poorly drained | D | Very limited | Very limited |
| Clinton silty clay loam, 5 to 9 percent slopes, eroded | 9K | Moderately well drained | C | Somewhat limited | Very limited |
| Grundy silty clay loam, 2 to 5 percent slopes | 8K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Weller silty clay loam, 5 to 9 percent slopes, moderately eroded | 8K | Moderately well drained | D | Very limited | Very limited |
| Olmitz-Zook-Vesser complex, 0 to 5 percent slopes | 8K | Poorly drained | C | Very limited | Very limited |
| Ladoga silty clay loam, 5 to 9 percent slopes, eroded | 8K | Moderately well drained | C | Somewhat limited | Very limited |
| Mahaska silty clay loam, 0 to 2 percent slopes | 8K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Clarinda silty clay loam, 5 to 9 percent slopes, moderately eroded | 8K | Poorly drained | D | Very limited | Very limited |
| Nodaway silt loam, shallow loess, 0 to 2 percent slopes, occasionally flooded | 7K | Moderately well drained | B | Very limited | Very limited |
| Lindley loam, 14 to 18 percent slopes, moderately eroded | 7K | Well drained | C | Very limited | Very limited |
| Nodaway-Vesser-Ackmore complex, 0 to 2 percent slopes | 7K | Poorly drained | C/D | Very limited | Very limited |
| Pershing silty clay loam, 5 to 9 percent slopes, moderately eroded | 7K | Somewhat poorly drained | D | Very limited | Very limited |
| Lindley loam, 25 to 40 percent slopes | 7K | Well drained | C | Very limited | Very limited |
| Nira silty clay loam, 5 to 9 percent slopes, moderately eroded | 7K | Moderately well drained | C | Very limited | Very limited |
| Hedrick silty clay loam, 5 to 9 percent slopes, moderately erode | 6K | Moderately well drained | C | Very limited | Very limited |
| Pershing silt loam, 2 to 5 percent slopes | 6K | Somewhat poorly drained | D | Very limited | Very limited |
| Otley silty clay loam, 5 to 9 percent slopes, eroded | 6K | Moderately well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 90% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 100% 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.