Green County, Wisconsin
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 Green County, Wisconsin.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Newglarus silt loam, moderately deep, 12 to 20 percent slopes, moderately eroded | 28K | Well drained | C | Very limited | Very limited |
| Newglarus silt loam, moderately deep, 6 to 12 percent slopes, moderately eroded | 23K | Well drained | C | Very limited | Very limited |
| Sogn silt loam, 12 to 30 percent slopes, moderately eroded | 14K | Somewhat excessively drained | D | Very limited | Very limited |
| Dodgeville silt loam, 6 to 12 percent slopes, moderately eroded | 12K | Well drained | C | Very limited | Very limited |
| Ossian silt loam, occasionally flooded | 10K | Poorly drained | B/D | Very limited | Very limited |
| Newglarus-Dunbarton silt loams, 12 to 20 percent slopes, moderately eroded | 10K | Well drained | C | Very limited | Very limited |
| Newglarus-Dunbarton silt loams, 6 to 12 percent slopes, moderately eroded | 9K | Well drained | C | Very limited | Very limited |
| Orion silt loam, 0 to 3 percent slopes, occasionally flooded | 8K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Edmund silt loam, 6 to 12 percent slopes, moderately eroded | 8K | Well drained | D | Very limited | Very limited |
| Palsgrove silt loam, 6 to 12 percent slopes, moderately eroded | 7K | Well drained | B | Somewhat limited | Very limited |
| Whalan silt loam, 6 to 12 percent slopes, moderately eroded | 6K | Well drained | C | Very limited | Very limited |
| Huntsville silt loam, 2 to 6 percent slopes, rarely flooded | 6K | Moderately well drained | B | Very limited | Somewhat limited |
| Edmund silt loam, 12 to 20 percent slopes, moderately eroded | 6K | Well drained | D | Very limited | Very limited |
| Richwood silt loam, 1 to 6 percent slopes | 6K | Well drained | B | Not limited | Very limited |
| Chaseburg silt loam, moderately well drained, 2 to 6 percent slopes | 5K | Moderately well drained | B | Very limited | Very limited |
| Festina silt loam, 1 to 6 percent slopes, moderately eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Dodgeville silt loam, 12 to 20 percent slopes, moderately eroded | 5K | Well drained | C | Very limited | Very limited |
| Sogn silt loam, 2 to 12 percent slopes, moderately eroded | 5K | Somewhat excessively drained | D | Very limited | Very limited |
| Otter silt loam, frequently flooded | 5K | Poorly drained | B/D | Very limited | Very limited |
| Sebewa silt loam, 0 to 2 percent slopes | 4K | Poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 90% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 93% 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.