Ashtabula County, Ohio
The most common soil here is Mill, on about 28% of the land: a silt loam, smooth, like flour. Platea and Darien come next.
About 4% of the land drains well, and 84% stays wet for long stretches; groundwater comes within two feet of the surface under 93% of it.
USDA rates 96% of the land very limited for a standard septic drain field, and 93% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 8% 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 Ashtabula 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 Ashtabula 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 |
|---|---|---|---|---|---|
| Mill silt loam, 0 to 2 percent slopes | 140K | Poorly drained | C/D | Very limited | Very limited |
| Platea-Darien silt loams, 2 to 6 percent slopes | 96K | Somewhat poorly drained | D | Very limited | Very limited |
| Wick silt loam, 0 to 2 percent slopes, frequently flooded | 20K | Very poorly drained | B/D | Very limited | Very limited |
| Darien and Platea silt loams, 6 to 12 percent slopes | 18K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Platea-Darien silt loams, 0 to 2 percent slopes | 18K | Somewhat poorly drained | D | Very limited | Very limited |
| Conneaut silt loam, 0 to 2 percent slopes | 14K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Venango silt loam, 2 to 6 percent slopes | 13K | Somewhat poorly drained | D | Very limited | Very limited |
| Stanhope silt loam, 0 to 2 percent slopes, frequently flooded | 10K | Poorly drained | B/D | Very limited | Very limited |
| Water | 7K | Not rated | Not rated | ||
| Udorthents | 7K | Not rated | Not rated | ||
| Gageville silt loam, 18 to 50 percent slopes | 7K | Moderately well drained | C/D | Very limited | Very limited |
| Painesville fine sandy loam, 0 to 2 percent slopes | 6K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Chenango gravelly loam, 2 to 6 percent slopes | 6K | Somewhat excessively drained | A | Not limited | Very limited |
| Canadice silt loam, 0 to 2 percent slopes | 6K | Poorly drained | D | Very limited | Very limited |
| Otego silt loam, 0 to 2 percent slopes, frequently flooded | 5K | Moderately well drained | B/D | Very limited | Very limited |
| Cambridge silt loam, 2 to 6 percent slopes | 5K | Moderately well drained | D | Very limited | Very limited |
| Sebring silt loam, 0 to 2 percent slopes | 5K | Poorly drained | C/D | Very limited | Very limited |
| Elnora loamy fine sand, 1 to 5 percent slopes | 4K | Moderately well drained | A/D | Very limited | Very limited |
| Caneadea-Canadice silt loams, 0 to 2 percent slopes | 4K | Somewhat poorly drained | D | Very limited | Very limited |
| Pierpont silt loam, 12 to 18 percent slopes | 4K | Moderately well drained | D | 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 93% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, 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.