Pottawattamie County, Iowa

Survey Area IA155 Iowa

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 Pottawattamie County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Exira silty clay loam, 9 to 14 percent slopes, eroded 54K Well drainedCSomewhat limitedVery limited
Ackmore-Colo-Judson complex, 0 to 5 percent slopes 53K Somewhat poorly drainedC/DVery limitedVery limited
Napier silt loam, 2 to 5 percent slopes 43K Well drainedBNot limitedSomewhat limited
Marshall silty clay loam, 2 to 5 percent slopes 43K Well drainedCSomewhat limitedVery limited
Ida silt loam, 14 to 20 percent slopes, severely eroded 41K Well drainedBVery limitedVery limited
Monona silt loam, 9 to 14 percent slopes, eroded 40K Well drainedBSomewhat limitedSomewhat limited
Judson silty clay loam, deep loess, 2 to 5 percent slopes 29K Well drainedCSomewhat limitedVery limited
Ida silt loam, 9 to 14 percent slopes, severely eroded 20K Well drainedBSomewhat limitedSomewhat limited
Monona silt loam, 5 to 9 percent slopes, eroded 20K Well drainedBNot limitedSomewhat limited
Marshall silty clay loam, 5 to 9 percent slopes, eroded 16K Well drainedCSomewhat limitedVery limited
Dockery-Quiver silt loams, deep loess, 0 to 2 percent slopes, occasionally flooded 14K Somewhat poorly drainedB/DVery limitedVery limited
Napier silt loam, 5 to 9 percent slopes 14K Well drainedBNot limitedSomewhat limited
Monona silt loam, 2 to 5 percent slopes 13K Well drainedBNot limitedSomewhat limited
Ackmore silt loam, 0 to 2 percent slopes, occasionally flooded 10K Somewhat poorly drainedC/DVery limitedVery limited
McPaul silt loam, 0 to 2 percent slopes 10K Moderately well drainedB/DVery limitedVery limited
Albaton silty clay, 0 to 2 percent slopes, occasionally flooded 8K Poorly drainedDVery limitedVery limited
Haynie silt loam, 0 to 2 percent slopes, occasionally flooded 8K Moderately well drainedBVery limitedVery limited
Monona silt loam, 5 to 9 percent slopes 8K Well drainedBNot limitedSomewhat limited
Marshall silty clay loam, 9 to 14 percent slopes, eroded 8K Well drainedCSomewhat limitedVery limited
Zook silty clay loam, 0 to 2 percent slopes, occasionally flooded 7K Poorly drainedDVery limitedVery limited

What This Means

Building & Foundations

About 32% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 65% 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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