Simpson County, Mississippi
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Simpson County, Mississippi.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Smithdale fine sandy loam, 12 to 40 percent slopes | 62K | Well drained | B | Very limited | Very limited |
| Smithdale fine sandy loam, 15 to 35 percent slopes | 35K | Well drained | B | Very limited | Very limited |
| Savannah loam, 2 to 5 percent slopes, eroded | 33K | Moderately well drained | C | Very limited | Very limited |
| Smithdale fine sandy loam, 8 to 15 percent slopes, eroded | 33K | Well drained | B | Somewhat limited | Very limited |
| Petal and Smithdale soils, 15 to 35 percent slopes | 26K | Moderately well drained | C | Very limited | Very limited |
| Petal and Smithdale soils, 8 to 15 percent slopes | 20K | Moderately well drained | C | Very limited | Very limited |
| Quitman-Jena-Trebloc association, flooded | 18K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Ruston fine sandy loam, 2 to 5 percent slopes, moderately eroded | 15K | Well drained | B | Not limited | Somewhat limited |
| Jena fine sandy loam, 0 to 2 percent slopes, occasionally flooded | 14K | Well drained | B | Very limited | Very limited |
| Savannah loam, 5 to 8 percent slopes, moderately eroded | 14K | Moderately well drained | C/D | Very limited | Very limited |
| Ruston fine sandy loam, 5 to 8 percent slopes, eroded | 13K | Well drained | B | Not limited | Somewhat limited |
| Ora loam, 2 to 5 percent slopes, moderately eroded | 10K | Moderately well drained | C | Very limited | Very limited |
| Stough loam, 0 to 2 percent slopes | 9K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Kirkville fine sandy loam, 0 to 2 percent slopes, occasionally flooded | 9K | Moderately well drained | C | Very limited | Very limited |
| Quitman loam, 0 to 2 percent slopes | 8K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Providence silt loam, 2 to 5 percent slopes, eroded | 8K | Moderately well drained | C/D | Very limited | Very limited |
| Ora loam, 5 to 8 percent slopes, eroded | 7K | Moderately well drained | C/D | Very limited | Very limited |
| Prentiss fine sandy loam, 0 to 2 percent slopes | 5K | Moderately well drained | C | Very limited | Very limited |
| Providence silt loam, 5 to 8 percent slopes, eroded | 4K | Moderately well drained | C/D | Very limited | Very limited |
| Trebloc silt loam, 0 to 2 percent slopes, frequently flooded | 4K | Poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 82% 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 92% 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
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.