Fremont County, Iowa
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 Fremont County, Iowa.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Monona silt loam, 9 to 14 percent slopes, eroded | 25K | Well drained | B | Somewhat limited | Somewhat limited |
| Marshall silty clay loam, 9 to 14 percent slopes, eroded | 25K | Well drained | C | Somewhat limited | Very limited |
| Colo-Judson silty clay loams, 0 to 5 percent slopes, occasionally flooded | 24K | Poorly drained | C/D | Very limited | Very limited |
| Marshall silty clay loam, 2 to 5 percent slopes | 23K | Well drained | C | Somewhat limited | Very limited |
| Napier silt loam, 2 to 5 percent slopes | 15K | Well drained | B | Not limited | Somewhat limited |
| Dockery-Quiver silt loams, deep loess, 0 to 2 percent slopes, occasionally flooded | 15K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Marshall silty clay loam, 5 to 9 percent slopes, eroded | 14K | Well drained | C | Somewhat limited | Very limited |
| Luton silty clay | 8K | Poorly drained | D | Very limited | Very limited |
| Kennebec silt loam, 0 to 2 percent slopes, occasionally flooded | 8K | Moderately well drained | B | Very limited | Very limited |
| Monona silt loam, 5 to 9 percent slopes, eroded | 8K | Well drained | B | Not limited | Somewhat limited |
| McPaul silt loam | 7K | Moderately well drained | B | Very limited | Very limited |
| Marshall silty clay loam, 5 to 9 percent slopes | 7K | Well drained | C | Somewhat limited | Very limited |
| Haynie silt loam, 0 to 2 percent slopes, occasionally flooded | 6K | Moderately well drained | B | Very limited | Very limited |
| Judson silty clay loam, deep loess, 2 to 5 percent slopes | 6K | Well drained | C | Somewhat limited | Very limited |
| Marshall silty clay loam, terrace, 0 to 2 percent slopes | 5K | Well drained | C | Somewhat limited | Very limited |
| Keg silt loam | 5K | Well drained | B | Very limited | Somewhat limited |
| Lakeport silty clay loam | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Monona silt loam, 5 to 9 percent slopes | 5K | Well drained | B | Not limited | Somewhat limited |
| Salix silty clay loam | 5K | Moderately well drained | C | Very limited | Very limited |
| Monona silt loam, 14 to 20 percent slopes, eroded | 5K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 40% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 73% 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.