Marion County, Missouri
The dominant drainage class is Poorly 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 Marion County, Missouri.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Mexico silt loam, 1 to 4 percent slopes, eroded | 25K | Poorly drained | D | Very limited | Very limited |
| Goss very gravelly silt loam, 14 to 45 percent slopes | 23K | Well drained | C | Very limited | Very limited |
| Armstrong loam, 9 to 14 percent slopes, eroded | 19K | Somewhat poorly drained | D | Very limited | Very limited |
| Armstrong loam, 5 to 9 percent slopes, eroded | 16K | Somewhat poorly drained | D | Very limited | Very limited |
| Putnam silt loam, 0 to 1 percent slopes | 16K | Poorly drained | D | Very limited | Very limited |
| Carlow silty clay, 0 to 2 percent slopes, occasionally flooded | 15K | Poorly drained | D | Very limited | Very limited |
| Belknap silt loam, 0 to 2 percent slopes, occasionally flooded | 14K | Somewhat poorly drained | C | Very limited | Very limited |
| Menfro silt loam, 5 to 9 percent slopes, eroded | 13K | Well drained | C | Somewhat limited | Very limited |
| Gorin silt loam, 5 to 9 percent slopes, eroded | 13K | Somewhat poorly drained | C | Very limited | Very limited |
| Smileyville silt loam, 2 to 6 percent slopes | 13K | Poorly drained | C/D | Very limited | Very limited |
| Winfield silt loam, 5 to 10 percent slopes, eroded | 10K | Moderately well drained | C | Somewhat limited | Very limited |
| Menfro silt loam, 9 to 14 percent slopes, eroded | 9K | Well drained | B | Somewhat limited | Somewhat limited |
| Leonard silt loam, 1 to 6 percent slopes, eroded | 9K | Poorly drained | C/D | Very limited | Very limited |
| Landes fine sandy loam, 0 to 2 percent slopes, occasionally flooded | 8K | Moderately well drained | B | Very limited | Very limited |
| Winfield silt loam, 9 to 14 percent slopes, eroded | 8K | Moderately well drained | C | Somewhat limited | Very limited |
| Fatima silt loam, 0 to 2 percent slopes, frequently flooded | 8K | Moderately well drained | C | Very limited | Very limited |
| Lindley loam, 14 to 20 percent slopes, eroded | 7K | Well drained | C | Very limited | Very limited |
| Lindley loam, 20 to 35 percent slopes, eroded | 7K | Well drained | C | Very limited | Very limited |
| Menfro silt loam, 2 to 5 percent slopes | 5K | Well drained | C | Somewhat limited | Somewhat limited |
| Chequest silty clay loam, 0 to 2 percent slopes, occasionally flooded | 5K | Poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 81% 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 94% 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.