HomeSoil seriesOzaukee
Ozaukee soil series
Ozaukee soils cover 418,782 mapped acres, mostly in Illinois, Wisconsin and Indiana. USDA rates shrink-swell a limit for houses without basements on 0% of that land, and a shallow water table a limit for basements on over 99%.
It is the leading soil series by area in 7 of the counties and cities on this site, including Milwaukee County, WI; Lake County, IL; Racine County, WI.
SSURGO survey versions to August 5, 2026 · series description revised 2017-02
of its land: shrink-swell limits houses without basements
of its land: a shallow water table limits basements
median highest linear extensibility (6% and up is high)
median highest clay content in the top 150 cm
USDA's description
The Ozaukee series consists of moderately well drained soils that are moderately deep or deep to a densic contact with till (Cd). They formed in as much as 46 cm (18 inches) of loess and in the underlying dense till on ground and end moraines. Slope ranges from 0 to 35 percent. Mean annual precipitation is about 950 mm (37.4 inches). Mean annual air temperature is about 9.7 degrees C (49.5 degrees F).
Source: USDA NRCS series description (OSD) for Ozaukee, revised 2017-02. Read it.
Engineering properties
| Mapped area (SSURGO) | 418,782 acres |
| Shrink-swell limits houses without basements | 0.0% |
| Shallow water table limits basements | 99.9% |
| Very limited for septic absorption fields | 99.9% |
| Most common drainage class | Moderately well drained |
| Most common hydrologic soil group | C |
| Taxonomic class | Fine, illitic, mesic Oxyaquic Hapludalfs |
| Type location | Lake County, Illinois |
Where Ozaukee is mapped
| State | Mapped acres |
|---|---|
| Illinois | 192,966 |
| Wisconsin | 150,978 |
| Indiana | 74,838 |
Places where Ozaukee leads
Counties and cities where Ozaukee covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| Milwaukee County, WI | 24% |
| Lake County, IL | 21% |
| Racine County, WI | 17% |
| Kenosha County, WI | 16% |
| Lake County, IN | 13% |
| Porter County, IN | 10% |
| Cook County, IL | 6% |
Other places where Ozaukee is a main soil
Counties and cities where Ozaukee is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.
Counties
Sources
Shares and properties: USDA NRCS SSURGO via Soil Data Access, weighted by each component's share of its map units. Description: the USDA NRCS series description. How we count.