HomeSoil seriesMiamian
Miamian soil series
Miamian soils cover 797,970 mapped acres, mostly in Ohio 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 78%.
It is the leading soil series by area in 53 of the counties and cities on this site, including Montgomery County, OH; Greene County, OH; Clark County, OH.
SSURGO survey versions to August 5, 2026 · series description revised 2021-11
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 Miamian series consists of very deep, well drained soils that are moderately deep to dense till. These soils formed in as much as 46 cm (18 inches) of loess and the underlying loamy till on till plains and moraines. Slope ranges from 0 to 50 percent. Mean annual precipitation is about 965 mm (38 inches), and mean annual air temperature is about 12 degrees C (53 degrees F).
Source: USDA NRCS series description (OSD) for Miamian, revised 2021-11. Read it.
Engineering properties
| Mapped area (SSURGO) | 797,970 acres |
| Shrink-swell limits houses without basements | 0.0% |
| Shallow water table limits basements | 78.4% |
| Very limited for septic absorption fields | 97.2% |
| Most common drainage class | Well drained |
| Most common hydrologic soil group | C |
| Taxonomic class | Fine, mixed, active, mesic Oxyaquic Hapludalfs |
| Type location | Montgomery County, Ohio |
Where Miamian is mapped
| State | Mapped acres |
|---|---|
| Ohio | 716,227 |
| Indiana | 81,743 |
Places where Miamian leads
Counties and cities where Miamian covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| Casstown, OH | 81% |
| Lockington, OH | 65% |
| South Salem, OH | 63% |
| Donnelsville, OH | 59% |
| Palestine, OH | 54% |
| Hollansburg, OH | 52% |
| Beavercreek, OH | 50% |
| Stoutsville, OH | 49% |
| Unionville Center, OH | 47% |
| Gettysburg, OH | 47% |
| Brice, OH | 46% |
| Yellow Springs, OH | 45% |
| Oakwood, OH | 43% |
| Greenfield, OH | 42% |
| Greenville, OH | 42% |
| Adelphi, OH | 41% |
| Bellefontaine, OH | 38% |
| West Elkton, OH | 38% |
| Vandalia, OH | 37% |
| Miamisburg, OH | 36% |
| Leesburg, OH | 36% |
| Valley Hi, OH | 35% |
| Port William, OH | 34% |
| Huber Heights, OH | 34% |
| Bellbrook, OH | 33% |
| New Holland, OH | 31% |
| Clayton, OH | 31% |
| Farmersville, OH | 30% |
| Clarksburg, OH | 30% |
| Tipp City, OH | 30% |
| Riverside, OH | 29% |
| Germantown, OH | 29% |
| Commercial Point, OH | 28% |
| Kettering, OH | 28% |
| Montgomery County, OH | 26% |
| Dayton, OH | 26% |
| Fairborn, OH | 25% |
| Greene County, OH | 24% |
| Springfield, OH | 24% |
| Union, OH | 24% |
| Trotwood, OH | 23% |
| Moraine, OH | 21% |
| Clark County, OH | 21% |
| Englewood, OH | 20% |
| Franklin, OH | 20% |
| Covington, OH | 18% |
| Circleville, OH | 18% |
| Logan County, OH | 15% |
| Wayne Lakes, OH | 12% |
| Lebanon, OH | 12% |
| Fairfield, OH | 10% |
| Highland County, OH | 10% |
| Warren County, OH | 8% |
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.