Hardin County, Illinois

Survey Area IL069 Illinois

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 Hardin County, Illinois.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Wellston silt loam, 18 to 35 percent slopes 9K Well drainedBVery limitedVery limited
Wellston-Berks complex, 18 to 35 percent slopes 8K Well drainedBVery limitedVery limited
Grantsburg silt loam, 5 to 10 percent slopes, eroded 7K Moderately well drainedCSomewhat limitedVery limited
Alford silt loam, 5 to 10 percent slopes, eroded 6K Well drainedBSomewhat limitedSomewhat limited
Hosmer silt loam, 5 to 10 percent slopes, eroded 4K Moderately well drainedCSomewhat limitedVery limited
Grantsburg silt loam, 10 to 18 percent slopes, severely eroded 4K Moderately well drainedCSomewhat limitedVery limited
Zanesville silt loam, 10 to 18 percent slopes, severely eroded 4K Moderately well drainedCSomewhat limitedVery limited
Alford-Baxter complex, 18 to 35 percent slopes 4K Well drainedBVery limitedVery limited
Alford silt loam, 18 to 25 percent slopes, severely eroded 4K Well drainedBVery limitedVery limited
Hosmer silt loam, 10 to 18 percent slopes, severely eroded 4K Moderately well drainedCSomewhat limitedVery limited
Burnside silt loam, 1 to 4 percent slopes, occasionally flooded 3K Well drainedBVery limitedVery limited
Baxter gravelly silt loam, 18 to 35 percent slopes 3K Well drainedBVery limitedVery limited
Belknap silt loam, 0 to 2 percent slopes, occasionally flooded 3K Somewhat poorly drainedB/DVery limitedVery limited
Water 3K Not ratedNot rated
Muskingum and Berks soils, 35 to 70 percent slopes 2K Well drainedCVery limitedVery limited
Alford silt loam, 25 to 35 percent slopes 2K Well drainedBVery limitedVery limited
Bedford silt loam, 10 to 18 percent slopes, severely eroded 2K Moderately well drainedCSomewhat limitedVery limited
Muskingum and Berks soils, 18 to 35 percent slopes 2K Well drainedCVery limitedVery limited
Sharon silt loam, 0 to 3 percent slopes, occasionally flooded 2K Moderately well drainedBVery limitedVery limited
Hosmer silt loam, 10 to 18 percent slopes, eroded 2K Moderately well drainedCSomewhat limitedVery limited

What This Means

Building & Foundations

About 53% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 88% 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.

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