Soil series profile
Lenawee soil series
Lenawee is a poorly drained soil with a silty clay loam surface, mapped on 187,837 acres in 36 counties across 2 states. Hydrologic group D.
- Drainage class
- Poorly drained 83% of mapped acres
- Hydrologic group
- D 78% of mapped acres
- Typical topsoil pH
- 6.5 slightly acidic · range 6.5–6.5
- Mapped area
- 188k acres in 36 counties, 2 states
Typical Lenawee profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–9 in (Ap) | Silty clay loam | 6.5 | 35% | 14% | 4.8% |
| 9–39 in (Bg) | Silty clay loam | 7.2 | 35% | 14% | 1.48% |
| 39–80 in (Cg) | Silty clay loam | 7.7 | 30% | 18% | 0.67% |

What this means
What Lenawee soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Lenawee soils is slightly acidic: pH 6.5, the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 97% of mapped Lenawee acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silty clay loam (94% of mapped Lenawee acres).
97% of mapped Lenawee acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.
For lawns and yards
On 97% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.
A seasonal high water table comes within 18 inches of the surface on 97% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.
For a septic system
For conventional septic absorption fields, NRCS rates 97% of the acres in mapped Lenawee soils very limited, 0% somewhat limited and 0% not limited (3% not rated, such as urban land, pits or water).
Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Lenawee soil is found
Mapped acres
Lenawee is mapped in Michigan and Ohio.
| County | Acres | Share of county land |
|---|---|---|
| Monroe County, MI | 24,764 | 7.0% |
| Macomb County, MI | 23,973 | 7.9% |
| Sandusky County, OH | 19,039 | 7.3% |
| Midland County, MI | 17,972 | 5.4% |
| Putnam County, OH | 13,889 | 4.5% |
| Genesee County, MI | 11,118 | 2.7% |
| Defiance County, OH | 7,749 | 2.9% |
| Ottawa County, OH | 7,433 | 4.6% |
| Lucas County, OH | 6,610 | 3.0% |
| Crawford County, OH | 5,831 | 2.3% |
| Lenawee County, MI | 5,700 | 1.2% |
| Seneca County, OH | 5,672 | 1.6% |
| Fulton County, OH | 5,606 | 2.2% |
| Williams County, OH | 4,307 | 1.6% |
| Gratiot County, MI | 4,046 | 1.1% |
| Huron County, OH | 3,673 | 1.2% |
| Berrien County, MI | 3,257 | 0.9% |
| Oakland County, MI | 3,120 | 0.6% |
| Henry County, OH | 3,009 | 1.1% |
| Barry County, MI | 2,698 | 0.8% |
| Saginaw County, MI | 2,666 | 0.5% |
| Jackson County, MI | 1,499 | 0.3% |
| Lapeer County, MI | 1,263 | 0.3% |
| Eaton County, MI | 1,022 | 0.3% |
| Shiawassee County, MI | 834 | 0.2% |
| Wyandot County, OH | 696 | 0.3% |
| Erie County, OH | 125 | 0.1% |
| Paulding County, OH | 111 | 0.0% |
| Marion County, OH | 68 | 0.0% |
| Van Wert County, OH | 55 | 0.0% |
| Richland County, OH | 29 | 0.0% |
| Lorain County, OH | 1 | 0.0% |
| Bay County, MI | 1 | 0.0% |
| Tuscola County, MI | 0 | 0.0% |
| Ashland County, OH | 0 | 0.0% |
| Morrow County, OH | 0 | 0.0% |
Septic absorption fields
NRCS rating, share of Lenawee acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 97.0% |
| Not rated | 3.0% |
Drainage, water table and flooding
Share of Lenawee acres
- Depth to seasonal high water table
- About 0 inches (median where reported); within 18 inches on 97% of acres.
- Flooding
- Mapped as flooding on 3% of acres (0% occasional, 3% frequent).
- Slope
- Typically 0–1% (median 0%).
- Topsoil organic matter
- Median 4.8%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 0.0% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 83.4% |
| Very poorly drained | 14.0% |
| Not rated | 2.6% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 0.0% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 78.4% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 18.6% |
| Not rated | 3.0% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Lenawee (component kind "Series") in SSURGO: 187,837 acres.
- Method
- Shares are by mapped acres of Lenawee components. The profile comes from the single largest Lenawee component. Full methodology.