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). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Tama silty clay loam, 2 to 5 percent slopes	78K	Well drained	C	Somewhat limited	Very limited
Colo-Ely complex, 0 to 5 percent slopes	38K	Poorly drained	C/D	Very limited	Very limited
Dinsdale silty clay loam, 2 to 5 percent slopes	23K	Moderately well drained	C	Somewhat limited	Very limited
Kenyon loam, 2 to 5 percent slopes	19K	Moderately well drained	C	Somewhat limited	Very limited
Muscatine silty clay loam, 0 to 2 percent slopes	16K	Somewhat poorly drained	C/D	Very limited	Very limited
Colo silty clay loam, 0 to 2 percent slopes, occasionally flooded	15K	Poorly drained	C/D	Very limited	Very limited
Muscatine silty clay loam, 2 to 5 percent slopes	14K	Somewhat poorly drained	C/D	Very limited	Very limited
Clyde silty clay loam, 0 to 3 percent slopes	12K	Poorly drained	C/D	Very limited	Very limited
Floyd loam, 1 to 4 percent slopes	9K	Somewhat poorly drained	B/D	Very limited	Very limited
Tama silty clay loam, 5 to 9 percent slopes, eroded	8K	Well drained	C	Somewhat limited	Very limited
Klinger silty clay loam, 2 to 5 percent slopes	7K	Somewhat poorly drained	C/D	Very limited	Very limited
Garwin silty clay loam, 0 to 2 percent slopes	7K	Poorly drained	C/D	Very limited	Very limited
Tama silty clay loam, 5 to 9 percent slopes	6K	Well drained	C	Somewhat limited	Very limited
Clyde-Floyd complex, 1 to 4 percent slopes	5K	Poorly drained	C/D	Very limited	Very limited
Marshan clay loam, 0 to 2 percent slopes, rarely flooded	4K	Poorly drained	C/D	Very limited	Very limited
Lawler loam, 0 to 2 percent slopes, rarely flooded	4K	Somewhat poorly drained	B/D	Very limited	Very limited
Dinsdale silty clay loam, 5 to 9 percent slopes, eroded	4K	Moderately well drained	C	Somewhat limited	Very limited
Sawmill silty clay loam, shallow loess, 0 to 2 percent slopes, occasionally flooded	4K	Poorly drained	C/D	Very limited	Very limited
Colo silty clay loam, channeled, 0 to 2 percent slopes, frequently flooded	3K	Poorly drained	C/D	Very limited	Very limited
Ostrander loam, 2 to 5 percent slopes	3K	Well drained	C	Not limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

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.