Soil series profile
Oshkosh soil series
Oshkosh is a well drained soil with a silt loam surface, mapped on 35,209 acres in 3 counties in WI. Hydrologic group C.
- Drainage class
- Well drained 100% of mapped acres
- Hydrologic group
- C >99% of mapped acres
- Typical topsoil pH
- 7.0 neutral · range 6.6–7.0
- Mapped area
- 35k acres in 3 counties, 1 state
Typical Oshkosh profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–7 in (Ap) | Silt loam | 7.0 | 21% | 26% | 1% |
| 7–29 in (Bt) | Silty clay | 6.8 | 55% | 3% | 0.25% |
| 29–79 in (C) | Silty clay | 7.9 | 50% | 10% | 0.25% |
What this means
What Oshkosh soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Oshkosh soils is neutral: pH 7.0 (most land between 6.6 and 7.0), the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers >99% of mapped Oshkosh acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (76% of mapped Oshkosh acres).
100% of mapped Oshkosh acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On >99% 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.
For a septic system
For conventional septic absorption fields, NRCS rates >99% of the acres in mapped Oshkosh soils very limited, 0% somewhat limited and 0% not limited.
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 Oshkosh soil is found
Mapped acres
Oshkosh is mapped in Wisconsin.
| County | Acres | Share of county land |
|---|---|---|
| Brown County, WI | 33,188 | 11.1% |
| Waupaca County, WI | 1,215 | 0.3% |
| Fond du Lac County, WI | 805 | 0.2% |
Septic absorption fields
NRCS rating, share of Oshkosh acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 99.3% |
| Not rated | 0.7% |
Drainage, water table and flooding
Share of Oshkosh acres
- Depth to seasonal high water table
- None reported within about 6.5 feet (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 1–4% (median 4%).
- Topsoil organic matter
- Median 1%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 100.0% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
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 | 99.3% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| 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 | 0.0% |
| Not rated | 0.7% |
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 Oshkosh (component kind "Series") in SSURGO: 35,209 acres.
- Method
- Shares are by mapped acres of Oshkosh components. The profile comes from the single largest Oshkosh component. Full methodology.