White 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 White County, Illinois.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Bonnie silt loam, 0 to 2 percent slopes, frequently flooded | 18K | Poorly drained | C/D | Very limited | Very limited |
| Belknap silt loam, 0 to 2 percent slopes, frequently flooded | 17K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Ava silt loam, 2 to 5 percent slopes | 13K | Moderately well drained | C | Very limited | Very limited |
| Ava silt loam, 5 to 10 percent slopes, eroded | 12K | Moderately well drained | C | Very limited | Very limited |
| Ava silty clay loam, 5 to 10 percent slopes, severely eroded | 8K | Moderately well drained | C | Somewhat limited | Very limited |
| Henshaw silt loam, 0 to 2 percent slopes | 7K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Ava silt loam, 2 to 5 percent slopes, eroded | 7K | Moderately well drained | C | Very limited | Very limited |
| Armiesburg silty clay loam, 0 to 2 percent slopes, frequently flooded | 7K | Well drained | B | Very limited | Very limited |
| Zipp silty clay, 0 to 2 percent slopes, frequently flooded | 7K | Poorly drained | C/D | Very limited | Very limited |
| Petrolia silty clay loam, undrained, 0 to 2 percent slopes, frequently flooded | 7K | Poorly drained | C/D | Very limited | Very limited |
| Ruark loam, 0 to 2 percent slopes, rarely flooded | 5K | Poorly drained | C/D | Very limited | Very limited |
| Patton silty clay loam, 0 to 2 percent slopes | 5K | Poorly drained | B/D | Very limited | Very limited |
| Nolin silty clay loam, 0 to 2 percent slopes, frequently flooded | 5K | Well drained | B | Very limited | Very limited |
| Newark silt loam, 0 to 2 percent slopes, frequently flooded | 5K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Patton silty clay loam, 0 to 2 percent slopes, rarely flooded | 5K | Poorly drained | B/D | Very limited | Very limited |
| Water | 5K | Not rated | Not rated | ||
| Bluford silt loam, 2 to 5 percent slopes | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Hickory-Ava complex, 10 to 18 percent slopes, severely eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Creal silt loam, 0 to 2 percent slopes | 5K | Somewhat poorly drained | C | Very limited | Very limited |
| Bluford silt loam, 0 to 2 percent slopes | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 88% 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 93% 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.