Lyon County, Iowa

Survey Area IA119 Iowa

The dominant drainage class is 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 Lyon County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Moody silty clay loam, cool, 2 to 6 percent slopes 41K Well drainedCSomewhat limitedVery limited
Galva silty clay loam, 2 to 5 percent slopes 36K Well drainedCSomewhat limitedVery limited
Moody silty clay loam, cool, 6 to 11 percent slopes, eroded 33K Well drainedCSomewhat limitedVery limited
Moody silty clay loam, cool, 2 to 6 percent slopes, eroded 31K Well drainedCSomewhat limitedVery limited
Primghar silty clay loam, 0 to 2 percent slopes 20K Somewhat poorly drainedC/DVery limitedVery limited
Ackmore silt loam, 0 to 2 percent slopes, occasionally flooded 13K Somewhat poorly drainedC/DVery limitedVery limited
Galva silty clay loam, 0 to 2 percent slopes 12K Well drainedCSomewhat limitedVery limited
Marcus silty clay loam, 0 to 2 percent slopes 11K Poorly drainedC/DVery limitedVery limited
Galva silty clay loam, 2 to 5 percent slopes, eroded 11K Well drainedCSomewhat limitedVery limited
Sac silty clay loam, loam substratum, 2 to 5 percent slopes 10K Moderately well drainedCSomewhat limitedVery limited
Trent silty clay loam, 2 to 5 percent slopes 10K Moderately well drainedCSomewhat limitedVery limited
Colo silty clay loam, deep loess, 0 to 2 percent slopes, occasionally flooded 9K Poorly drainedC/DVery limitedVery limited
Spillco loam, 0 to 2 percent slopes, occasionally flooded 8K Moderately well drainedBVery limitedVery limited
Calco silty clay loam, 0 to 2 percent slopes, occasionally flooded 8K Poorly drainedC/DVery limitedVery limited
Primghar silty clay loam, 2 to 5 percent slopes 8K Somewhat poorly drainedC/DVery limitedVery limited
Egan silty clay loam, 2 to 5 percent slopes 7K Well drainedCNot limitedVery limited
Trent silty clay loam, 0 to 3 percent slopes 6K Well drainedCSomewhat limitedVery limited
Galva silty clay loam, 5 to 9 percent slopes, eroded 5K Well drainedCSomewhat limitedVery limited
Galva silty clay loam, stratified substratum, 0 to 2 percent slopes 5K Well drainedCSomewhat limitedVery limited
Egan silty clay loam, 2 to 5 percent slopes, moderately eroded 5K Well drainedCSomewhat limitedVery limited

What This Means

Building & Foundations

About 26% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

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.

Look Up a Specific Address

📍