79 counties mapped. On average, 3% of Michigan county soil area is high shrink-swell clay (USDA SSURGO).
Higher percentages mean more of a county's mapped soil is shrink-swell clay that expands and contracts with moisture. This is county-scale exposure, not a diagnosis of any single home — but it tells you whether soil movement belongs on your radar.
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Before you call a foundation company →| County | Tier | High-risk % | Moderate % |
|---|---|---|---|
| Ontonagon | High | 24% | 3% |
| St. Clair | High | 24% | 43% |
| Chippewa | High | 19% | 5% |
| Alcona | Moderate | 11% | 7% |
| Monroe | Moderate | 11% | 49% |
| Ogemaw | Moderate | 10% | 26% |
| Iosco | Moderate | 9% | 14% |
| Arenac | Moderate | 8% | 33% |
| Montmorency | Moderate | 7% | 6% |
| Alpena | Moderate | 7% | 24% |
| Mackinac | Moderate | 7% | 5% |
| Washtenaw | Moderate | 6% | 41% |
| Saginaw | Moderate | 6% | 43% |
| Lenawee | Moderate | 6% | 67% |
| Oscoda | Moderate | 6% | 3% |
| Wayne | Moderate | 5% | 26% |
| Oceana | Moderate | 5% | 5% |
| Berrien | Low | 5% | 31% |
| Gladwin | Low | 5% | 32% |
| Lapeer | Low | 4% | 35% |
| Allegan | Low | 4% | 16% |
| Roscommon | Low | 4% | 3% |
| Macomb | Low | 3% | 51% |
| Mason | Low | 3% | 8% |
| Cheboygan | Low | 3% | 4% |
| Luce | Low | 3% | 0% |
| Missaukee | Low | 3% | 18% |
| Presque Isle | Low | 2% | 5% |
| Midland | Low | 2% | 39% |
| Houghton | Low | 2% | 2% |
| Kalkaska | Low | 2% | 1% |
| Mecosta | Low | 2% | 12% |
| Newaygo | Low | 1% | 9% |
| Osceola | Low | 1% | 25% |
| Crawford | Low | 1% | 0% |
| Gratiot | Low | 1% | 52% |
| Ottawa | Low | 1% | 32% |
| Kent | Low | 1% | 17% |
| Baraga | Low | 1% | 2% |
| Gogebic | Low | 1% | 0% |
| Oakland | Low | 1% | 22% |
| Genesee | Low | 1% | 18% |
| Antrim | Low | 0% | 2% |
| Muskegon | Low | 0% | 15% |
| Charlevoix | Low | 0% | 4% |
| Jackson | Low | 0% | 21% |
| Menominee | Low | 0% | 0% |
| Otsego | Low | 0% | 7% |
| Delta | Low | 0% | 2% |
| Grand Traverse | Low | 0% | 5% |
| Leelanau | Low | 0% | 2% |
| Tuscola | Low | 0% | 11% |
| Alger | Low | 0% | 1% |
| Emmet | Low | 0% | 4% |
| Ionia | Low | 0% | 34% |
| Kalamazoo | Low | 0% | 15% |
| Sanilac | Low | 0% | 54% |
| Schoolcraft | Low | 0% | 0% |
| Barry | Low | 0% | 10% |
| Bay | Low | 0% | 19% |
| Branch | Low | 0% | 32% |
| Calhoun | Low | 0% | 14% |
| Cass | Low | 0% | 11% |
| Clare | Low | 0% | 24% |
| Clinton | Low | 0% | 22% |
| Dickinson | Low | 0% | 0% |
| Eaton | Low | 0% | 15% |
| Hillsdale | Low | 0% | 55% |
| Huron | Low | 0% | 14% |
| Ingham | Low | 0% | 24% |
| Iron | Low | 0% | 0% |
| Isabella | Low | 0% | 34% |
| Livingston | Low | 0% | 25% |
| Marquette | Low | 0% | 0% |
| Montcalm | Low | 0% | 16% |
| St. Joseph | Low | 0% | 4% |
| Shiawassee | Low | 0% | 8% |
| Van Buren | Low | 0% | 16% |
| Keweenaw | Low | 0% | 0% |
Risk metrics are computed from USDA SSURGO soil survey data (linear extensibility of soil components, area-weighted by county). Soil varies lot to lot — this is county-scale context, not a substitute for a site-specific geotechnical or structural assessment.