Monroe County, Illinois

Survey Area IL133 Illinois

The dominant drainage class is Well drained and the dominant hydrologic group is C/D (varies with drainage). 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 Monroe County, Illinois.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Bunkum silty clay loam, 5 to 10 percent slopes, severely eroded 13K Somewhat poorly drainedC/DVery limitedVery limited
Homen silt loam, 2 to 5 percent slopes 12K Moderately well drainedCSomewhat limitedVery limited
Fults silty clay, 0 to 2 percent slopes, occasionally flooded 12K Poorly drainedDVery limitedVery limited
Bunkum silty clay loam, 10 to 18 percent slopes, severely eroded 11K Somewhat poorly drainedC/DVery limitedVery limited
Marine silt loam, 2 to 5 percent slopes 9K Somewhat poorly drainedC/DVery limitedVery limited
Menfro silt loam, karst, 25 to 60 percent slopes 9K Well drainedBVery limitedVery limited
Ambraw silty clay loam, 0 to 2 percent slopes, occasionally flooded 9K Poorly drainedC/DVery limitedVery limited
Menfro silt loam, karst, 12 to 25 percent slopes, severely eroded 9K Well drainedBVery limitedVery limited
Landes very fine sandy loam, 2 to 5 percent slopes, occasionally flooded 8K Well drainedAVery limitedVery limited
Stookey silt loam, 35 to 70 percent slopes 8K Well drainedBVery limitedVery limited
Shaffton clay loam, 0 to 2 percent slopes, occasionally flooded 8K Somewhat poorly drainedB/DVery limitedVery limited
Wakeland silt loam, 0 to 2 percent slopes, frequently flooded 7K Somewhat poorly drainedB/DVery limitedVery limited
Water 7K Not ratedNot rated
Hickory silt loam, 18 to 35 percent slopes, eroded 7K Well drainedBVery limitedVery limited
Booker clay, 0 to 2 percent slopes, occasionally flooded, long duration 6K Very poorly drainedDVery limitedVery limited
Menfro silt loam, karst, 5 to 12 percent slopes, severely eroded 6K Well drainedBSomewhat limitedSomewhat limited
Menfro silt loam, 2 to 5 percent slopes 5K Well drainedCSomewhat limitedSomewhat limited
Homen silt loam, 5 to 10 percent slopes, eroded 5K Moderately well drainedCSomewhat limitedVery limited
Atlas silty clay loam, 10 to 18 percent slopes, severely eroded 5K Somewhat poorly drainedDVery limitedVery limited
Sonsac flaggy silt loam, 18 to 35 percent slopes 5K Well drainedDVery limitedVery limited

What This Means

Building & Foundations

About 78% 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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