Franklin County, Ohio
The most common soil here is Crosby, on about 20% of the land: a silt loam, smooth, like flour. Bennington and Kokomo come next.
About 11% of the land drains well, and 56% stays wet for long stretches; groundwater comes within two feet of the surface under 65% of it.
USDA rates 83% of the land very limited for a standard septic drain field, and 73% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 5% of the land floods occasionally or more, and bedrock lies within 40 inches under 1% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Franklin County, Ohio, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Somewhat poorly drained and the dominant hydrologic group is C/D (varies with drainage). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 Franklin County, Ohio. 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 |
|---|---|---|---|---|---|
| Kokomo silty clay loam, 0 to 2 percent slopes | 38K | Very poorly drained | C/D | Very limited | Very limited |
| Crosby silt loam, Southern Ohio Till Plain, 0 to 2 percent slopes | 32K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Bennington-Urban land complex, 0 to 2 percent slopes | 21K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Crosby silt loam, Southern Ohio Till Plain, 2 to 6 percent slopes | 20K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Bennington silt loam, 2 to 6 percent slopes | 18K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Crosby-Urban land complex, 0 to 2 percent slopes | 17K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Lewisburg-Crosby complex, 2 to 6 percent slopes | 15K | Moderately well drained | D | Somewhat limited | Very limited |
| Crosby-Urban land complex, 2 to 6 percent slopes | 13K | Not rated | Not rated | ||
| Bennington-Urban land complex, 0 to 6 percent slopes | 13K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Celina silt loam, 2 to 6 percent slopes | 12K | Moderately well drained | C/D | Very limited | Very limited |
| Bennington silt loam, 0 to 2 percent slopes | 10K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Pewamo silty clay loam, low carbonate till, 0 to 2 percent slopes | 9K | Very poorly drained | C/D | Very limited | Very limited |
| Udorthents-Urban land complex, gently rolling | 8K | Not rated | Not rated | ||
| Eldean-Urban land complex, 2 to 6 percent slopes | 6K | Not rated | Not rated | ||
| Cardington silt loam, 2 to 6 percent slopes | 6K | Moderately well drained | C/D | Very limited | Very limited |
| Celina-Urban land complex, 2 to 6 percent slopes | 6K | Not rated | Not rated | ||
| Cardington-Urban land complex, 2 to 6 percent slopes | 5K | Not rated | Not rated | ||
| Miamian silt loam, 2 to 6 percent slopes | 5K | Well drained | C | Very limited | Very limited |
| Water | 5K | Not rated | Not rated | ||
| Medway silt loam, occasionally flooded | 5K | Moderately well drained | C | Very 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.
What This Means
Building & Foundations
About 73% 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 83% 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.