DeKalb County, Illinois

Survey Area IL037 Illinois

The dominant drainage class is Moderately 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 DeKalb County, Illinois.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Elpaso silty clay loam, 0 to 2 percent slopes 65K Poorly drainedB/DVery limitedVery limited
Flanagan silt loam, 0 to 2 percent slopes 57K Somewhat poorly drainedC/DVery limitedVery limited
Danabrook silt loam, 2 to 5 percent slopes 56K Moderately well drainedCSomewhat limitedVery limited
Drummer silty clay loam, 0 to 2 percent slopes 43K Poorly drainedB/DVery limitedVery limited
Catlin silt loam, 2 to 5 percent slopes 36K Moderately well drainedCSomewhat limitedVery limited
Wingate silt loam, cool mesic, 2 to 5 percent slopes 12K Moderately well drainedCVery limitedVery limited
Otter silt loam, 0 to 2 percent slopes, frequently flooded 12K Poorly drainedB/DVery limitedVery limited
Elburn silt loam, 0 to 2 percent slopes 9K Somewhat poorly drainedB/DVery limitedVery limited
Mayville silt loam, 2 to 5 percent slopes 9K Moderately well drainedCVery limitedVery limited
Parr silt loam, 5 to 10 percent slopes, eroded 8K Moderately well drainedCSomewhat limitedVery limited
Catlin silt loam, 0 to 2 percent slopes 8K Moderately well drainedCSomewhat limitedVery limited
Parr silt loam, 2 to 5 percent slopes, eroded 7K Moderately well drainedCSomewhat limitedVery limited
Harpster silty clay loam, 0 to 2 percent slopes 6K Poorly drainedB/DVery limitedVery limited
Danabrook silt loam, 5 to 10 percent slopes, eroded 6K Moderately well drainedCSomewhat limitedVery limited
Lisbon silt loam, 0 to 2 percent slopes 5K Somewhat poorly drainedC/DVery limitedVery limited
Herbert silt loam, 0 to 2 percent slopes 5K Somewhat poorly drainedC/DVery limitedVery limited
Kaneville silt loam, 2 to 5 percent slopes 4K Moderately well drainedCSomewhat limitedVery limited
Octagon silt loam, 4 to 6 percent slopes, eroded 4K Moderately well drainedCSomewhat limitedVery limited
Kidami loam, 4 to 6 percent slopes, eroded 4K Moderately well drainedCSomewhat limitedVery limited
Kaneville silt loam, 0 to 2 percent slopes 3K Moderately well drainedCSomewhat limitedVery limited

What This Means

Building & Foundations

About 62% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 100% 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

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.

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