Grundy County, Iowa

Survey Area IA075 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 Grundy County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Tama silty clay loam, 2 to 5 percent slopes 78K Well drainedCSomewhat limitedVery limited
Colo-Ely complex, 0 to 5 percent slopes 38K Poorly drainedC/DVery limitedVery limited
Dinsdale silty clay loam, 2 to 5 percent slopes 23K Moderately well drainedCSomewhat limitedVery limited
Kenyon loam, 2 to 5 percent slopes 19K Moderately well drainedCSomewhat limitedVery limited
Muscatine silty clay loam, 0 to 2 percent slopes 16K Somewhat poorly drainedC/DVery limitedVery limited
Colo silty clay loam, 0 to 2 percent slopes, occasionally flooded 15K Poorly drainedC/DVery limitedVery limited
Muscatine silty clay loam, 2 to 5 percent slopes 14K Somewhat poorly drainedC/DVery limitedVery limited
Clyde silty clay loam, 0 to 3 percent slopes 12K Poorly drainedC/DVery limitedVery limited
Floyd loam, 1 to 4 percent slopes 9K Somewhat poorly drainedB/DVery limitedVery limited
Tama silty clay loam, 5 to 9 percent slopes, eroded 8K Well drainedCSomewhat limitedVery limited
Klinger silty clay loam, 2 to 5 percent slopes 7K Somewhat poorly drainedC/DVery limitedVery limited
Garwin silty clay loam, 0 to 2 percent slopes 7K Poorly drainedC/DVery limitedVery limited
Tama silty clay loam, 5 to 9 percent slopes 6K Well drainedCSomewhat limitedVery limited
Clyde-Floyd complex, 1 to 4 percent slopes 5K Poorly drainedC/DVery limitedVery limited
Marshan clay loam, 0 to 2 percent slopes, rarely flooded 4K Poorly drainedC/DVery limitedVery limited
Lawler loam, 0 to 2 percent slopes, rarely flooded 4K Somewhat poorly drainedB/DVery limitedVery limited
Dinsdale silty clay loam, 5 to 9 percent slopes, eroded 4K Moderately well drainedCSomewhat limitedVery limited
Sawmill silty clay loam, shallow loess, 0 to 2 percent slopes, occasionally flooded 4K Poorly drainedC/DVery limitedVery limited
Colo silty clay loam, channeled, 0 to 2 percent slopes, frequently flooded 3K Poorly drainedC/DVery limitedVery limited
Ostrander loam, 2 to 5 percent slopes 3K Well drainedCNot limitedVery limited

What This Means

Building & Foundations

About 49% 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.

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