Grant 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 Grant County, Wisconsin.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Fayette silt loam, 6 to 12 percent slopes, moderately eroded | 119K | Well drained | C | Somewhat limited | Very limited |
| Lacrescent-Dunbarton complex, very stony, 30 to 60 percent slopes | 41K | Well drained | B | Very limited | Very limited |
| Arenzville silt loam, 0 to 3 percent slopes, occasionally flooded | 38K | Moderately well drained | B | Very limited | Very limited |
| Palsgrove silt loam, 6 to 12 percent slopes, moderately eroded | 37K | Well drained | B | Somewhat limited | Very limited |
| Palsgrove silt loam, 12 to 20 percent slopes, moderately eroded | 36K | Well drained | B | Very limited | Very limited |
| Newglarus silt loam, moderately deep, 20 to 30 percent slopes, moderately eroded | 36K | Well drained | C | Very limited | Very limited |
| Newglarus silt loam, moderately deep, 12 to 20 percent slopes, moderately eroded | 33K | Well drained | C | Very limited | Very limited |
| Tama silt loam, driftless, 2 to 6 percent slopes, moderately eroded | 33K | Well drained | C | Somewhat limited | Very limited |
| Tama silt loam, driftless, 6 to 12 percent slopes, moderately eroded | 27K | Well drained | C | Somewhat limited | Very limited |
| Fayette silt loam, 2 to 6 percent slopes, moderately eroded | 25K | Well drained | C | Somewhat limited | Very limited |
| Dorerton, very stony-Elbaville complex, 30 to 60 percent slopes | 24K | Well drained | B | Very limited | Very limited |
| Water | 22K | Not rated | Not rated | ||
| Newglarus complex, 12 to 20 percent slopes, moderately eroded | 17K | Well drained | C | Very limited | Very limited |
| Dubuque soils, deep, 10 to 15 percent slopes, moderately eroded | 16K | Well drained | C | Very limited | Very limited |
| Algansee-Kalmarville complex, river valleys, 0 to 3 percent slopes, frequently flooded | 13K | Somewhat poorly drained | A/D | Very limited | Very limited |
| Dubuque soils, deep, 6 to 10 percent slopes, moderately eroded | 12K | Well drained | C | Very limited | Very limited |
| Fayette silt loam, 12 to 20 percent slopes, moderately eroded | 10K | Well drained | C | Somewhat limited | Very limited |
| Newglarus silt loam, moderately deep, 6 to 12 percent slopes, moderately eroded | 10K | Well drained | C | Very limited | Very limited |
| Downs silt loam, 6 to 12 percent slopes, moderately eroded | 9K | Well drained | C | Somewhat limited | Very limited |
| Gaphill-Rockbluff complex, 30 to 60 percent slopes | 8K | Well drained | A | Very limited | Very limited |
What This Means
Building & Foundations
About 50% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 96% 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.