St. Croix County, Wisconsin
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 St. Croix County, Wisconsin.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Santiago silt loam, 2 to 6 percent slopes | 32K | Well drained | B | Not limited | Somewhat limited |
| Freeon silt loam, 2 to 6 percent slopes | 23K | Moderately well drained | C/D | Very limited | Very limited |
| Magnor silt loam, 0 to 4 percent slopes | 21K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Skyberg silt loam, 0 to 3 percent slopes | 16K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Pillot silt loam, 0 to 3 percent slopes | 16K | Well drained | B | Not limited | Very limited |
| Sattre silt loam, 2 to 6 percent slopes | 15K | Well drained | B | Not limited | Very limited |
| Vlasaty silt loam, 2 to 6 percent slopes | 15K | Moderately well drained | C | Very limited | Very limited |
| Amery loam, 6 to 12 percent slopes, eroded | 15K | Well drained | C | Somewhat limited | Very limited |
| Jewett silt loam, 2 to 6 percent slopes | 14K | Well drained | C | Somewhat limited | Somewhat limited |
| Santiago silt loam, 6 to 12 percent slopes, eroded | 13K | Well drained | B | Somewhat limited | Somewhat limited |
| Jewett silt loam, sandy substratum, 2 to 6 percent slopes | 13K | Well drained | C | Not limited | Very limited |
| Burkhardt-Sattre complex, 6 to 12 percent slopes, eroded | 11K | Excessively drained | A | Somewhat limited | Very limited |
| Antigo silt loam, 2 to 6 percent slopes | 10K | Well drained | B | Not limited | Very limited |
| Water | 10K | Not rated | Not rated | ||
| Burkhardt-Sattre complex, 12 to 30 percent slopes, eroded | 9K | Excessively drained | A | Very limited | Very limited |
| Freeon silt loam, heavy substratum, 2 to 6 percent slopes | 8K | Moderately well drained | B/D | Very limited | Very limited |
| Amery loam, 12 to 20 percent slopes, eroded | 8K | Well drained | C | Very limited | Very limited |
| Fluvaquents | 7K | Somewhat poorly drained | B | Very limited | Very limited |
| Sattre loam, 2 to 6 percent slopes | 7K | Well drained | B | Not limited | Very limited |
| Sattre silt loam, 0 to 2 percent slopes | 7K | Well drained | B | Not 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 74% 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.