Humboldt County, Iowa

Survey Area IA091 Iowa

The dominant drainage class is Poorly 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 Humboldt County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Canisteo clay loam, 0 to 2 percent slopes 86K Poorly drainedC/DVery limitedVery limited
Clarion loam, 2 to 6 percent slopes 47K Moderately well drainedCSomewhat limitedVery limited
Webster clay loam, 0 to 2 percent slopes 33K Poorly drainedC/DVery limitedVery limited
Nicollet clay loam, 1 to 3 percent slopes 30K Somewhat poorly drainedC/DVery limitedVery limited
Okoboji silty clay loam, 0 to 1 percent slopes 8K Very poorly drainedC/DVery limitedVery limited
Garmore clay loam, 0 to 2 percent slopes 8K Moderately well drainedCSomewhat limitedVery limited
Harps clay loam, 0 to 2 percent slopes 7K Poorly drainedC/DVery limitedVery limited
Wacousta silty clay loam, depressional, 0 to 1 percent slopes 6K Very poorly drainedC/DVery limitedVery limited
Clarion loam, 6 to 10 percent slopes, moderately eroded 5K Well drainedBSomewhat limitedSomewhat limited
Spillville-Coland complex, channeled, 0 to 2 percent slopes, frequently flooded 5K Somewhat poorly drainedB/DVery limitedVery limited
Harps-Okoboji complex, 0 to 2 percent slopes 5K Poorly drainedC/DVery limitedVery limited
Lester loam, 2 to 6 percent slopes 4K Well drainedCSomewhat limitedVery limited
Clarion-Storden complex, 6 to 10 percent slopes, moderately eroded 3K Well drainedBSomewhat limitedSomewhat limited
Calcousta silty clay loam, 0 to 1 percent slopes 2K Very poorly drainedC/DVery limitedVery limited
Ridgeport sandy loam, 0 to 2 percent slopes 2K Somewhat excessively drainedANot limitedVery limited
Biscay clay loam, 0 to 2 percent slopes 1K Poorly drainedC/DVery limitedVery limited
Okoboji mucky silty clay loam, depressional, 0 to 1 percent slopes 1K Very poorly drainedC/DVery limitedVery limited
Wadena loam, 0 to 2 percent slopes 1K Well drainedBNot limitedVery limited
Wacousta mucky silty clay loam, depressional, 0 to 1 percent slopes 1K Very poorly drainedC/DVery limitedVery limited
Rolfe silt loam, 0 to 1 percent slopes 1K Very poorly drainedC/DVery limitedVery limited

What This Means

Building & Foundations

About 72% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 96% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.

Look Up a Specific Address

📍