Polk County, Minnesota
The most common soil here is Colvin, on about 13% of the land: a silty clay loam, smooth and slightly sticky. Bearden and Perella come next.
About 15% of the land drains well, and 74% stays wet for long stretches; groundwater comes within two feet of the surface under 61% of it.
USDA rates 91% of the land very limited for a standard septic drain field, and 79% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 2% of the land floods occasionally or more.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Polk County, Minnesota, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Somewhat poorly drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Polk County, Minnesota. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Bearden-Colvin silty clay loams, 0 to 2 percent slopes | 189K | Somewhat poorly drained | C | Very limited | Very limited |
| Colvin-Perella silty clay loams, 0 to 1 percent slopes | 100K | Poorly drained | C/D | Very limited | Very limited |
| Colvin silty clay loam, 0 to 1 percent slopes | 51K | Poorly drained | C/D | Very limited | Very limited |
| Chapett fine sandy loam, 2 to 6 percent slopes | 51K | Well drained | B | Not limited | Somewhat limited |
| Grimstad fine sandy loam, 0 to 2 percent slopes, aspen parkland | 50K | Somewhat poorly drained | B | Very limited | Very limited |
| Ulen loamy fine sand, 0 to 2 percent slopes | 42K | Somewhat poorly drained | A | Very limited | Very limited |
| Hedman-Fram complex | 37K | Poorly drained | B/D | Very limited | Very limited |
| Colvin-Fargo complex, 0 to 1 percent slopes | 28K | Poorly drained | C/D | Very limited | Very limited |
| Strathcona fine sandy loam, 0 to 1 percent slopes | 27K | Poorly drained | B/D | Very limited | Very limited |
| Glyndon very fine sandy loam, 0 to 2 percent slopes | 27K | Somewhat poorly drained | C | Very limited | Very limited |
| Rosewood fine sandy loam, Aspen Parkland, 0 to 1 percent slopes | 24K | Poorly drained | A/D | Very limited | Very limited |
| Foxlake loam, 0 to 1 percent slopes | 22K | Poorly drained | C/D | Very limited | Very limited |
| Sandberg-Radium complex, 0 to 6 percent slopes | 20K | Excessively drained | A | Not limited | Very limited |
| Bearden silt loam, 0 to 2 percent slopes | 20K | Somewhat poorly drained | C | Very limited | Very limited |
| Fram loam | 19K | Somewhat poorly drained | C | Very limited | Very limited |
| Bearden-Fargo complex, 0 to 2 percent slopes | 18K | Somewhat poorly drained | C | Very limited | Very limited |
| Wheatville very fine sandy loam, clayey till substratum, 0 to 2 percent slopes | 17K | Somewhat poorly drained | C | Very limited | Very limited |
| Huot fine sandy loam, clayey till substratum, 0 to 2 percent slopes | 17K | Moderately well drained | B | Somewhat limited | Very limited |
| Esmond-Heimdal-Sisseton complex, 2 to 6 percent slopes | 16K | Well drained | B | Not limited | Somewhat limited |
| Water | 16K | Not rated | Not rated |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 79% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas. A geotechnical assessment is recommended before building.
Septic Systems
About 91% 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.