Iroquois County, Illinois
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 Iroquois County, Illinois.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Milford silty clay loam, 0 to 2 percent slopes | 118K | Poorly drained | C/D | Very limited | Very limited |
| Bryce silty clay, 0 to 2 percent slopes | 99K | Poorly drained | C/D | Very limited | Very limited |
| Selma loam, 0 to 2 percent slopes | 60K | Poorly drained | B/D | Very limited | Very limited |
| Pella clay loam, Glacial Lake Watseka, 0 to 2 percent slopes | 42K | Poorly drained | B/D | Very limited | Very limited |
| Lisbon silt loam, 0 to 2 percent slopes | 30K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Martinton silt loam, 0 to 2 percent slopes | 24K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Ridgeville fine sandy loam, 0 to 2 percent slopes | 23K | Somewhat poorly drained | A/D | Very limited | Very limited |
| La Hogue loam, 0 to 2 percent slopes | 21K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Swygert silty clay loam, 0 to 2 percent slopes | 19K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Gilford fine sandy loam, 0 to 2 percent slopes | 19K | Poorly drained | A/D | Very limited | Very limited |
| Rowe silty clay loam, 0 to 2 percent slopes | 17K | Poorly drained | D | Very limited | Very limited |
| Watseka loamy fine sand, 0 to 2 percent slopes | 14K | Somewhat poorly drained | A/D | Very limited | Very limited |
| Odell silt loam, 0 to 2 percent slopes | 14K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Ashkum silty clay loam, 0 to 2 percent slopes | 12K | Poorly drained | C/D | Very limited | Very limited |
| Clarence silty clay loam, 0 to 2 percent slopes | 12K | Somewhat poorly drained | D | Very limited | Very limited |
| Sparta loamy fine sand, 1 to 6 percent slopes | 11K | Excessively drained | A | Not limited | Very limited |
| Reddick clay loam, 0 to 2 percent slopes | 9K | Poorly drained | C/D | Very limited | Very limited |
| Corwin loam, 2 to 5 percent slopes | 9K | Moderately well drained | C | Very limited | Very limited |
| Rantoul silty clay, 0 to 2 percent slopes | 9K | Very poorly drained | D | Very limited | Very limited |
| Sawmill silty clay loam, heavy till plain, 0 to 2 percent slopes, frequently flooded | 8K | Poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 98% 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 100% 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.