67 counties mapped. On average, 2% of Florida 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 % |
|---|---|---|---|
| Nassau | Moderate | 13% | 6% |
| Sumter | Moderate | 11% | 14% |
| Marion | Moderate | 9% | 13% |
| Hernando | Moderate | 7% | 9% |
| Brevard | Moderate | 6% | 4% |
| Duval | Moderate | 6% | 2% |
| Flagler | Moderate | 6% | 7% |
| Gulf | Moderate | 6% | 6% |
| Polk | Moderate | 6% | 4% |
| Franklin | Moderate | 5% | 1% |
| Levy | Moderate | 5% | 12% |
| St. Johns | Moderate | 5% | 1% |
| Lake | Low | 5% | 6% |
| Liberty | Low | 4% | 4% |
| Seminole | Low | 4% | 0% |
| Calhoun | Low | 4% | 6% |
| Alachua | Low | 4% | 4% |
| Suwannee | Low | 3% | 3% |
| Volusia | Low | 3% | 2% |
| Hamilton | Low | 3% | 1% |
| Clay | Low | 2% | 0% |
| Putnam | Low | 2% | 1% |
| Indian River | Low | 1% | 4% |
| Pasco | Low | 1% | 7% |
| Jackson | Low | 1% | 9% |
| Leon | Low | 1% | 0% |
| Santa Rosa | Low | 1% | 2% |
| Hillsborough | Low | 1% | 5% |
| Osceola | Low | 1% | 0% |
| Wakulla | Low | 1% | 4% |
| Lee | Low | 1% | 3% |
| Orange | Low | 1% | 3% |
| Walton | Low | 1% | 1% |
| Citrus | Low | 1% | 3% |
| Gadsden | Low | 0% | 0% |
| Baker | Low | 0% | 1% |
| Columbia | Low | 0% | 1% |
| Gilchrist | Low | 0% | 0% |
| Holmes | Low | 0% | 1% |
| Okaloosa | Low | 0% | 1% |
| St. Lucie | Low | 0% | 6% |
| Martin | Low | 0% | 4% |
| Taylor | Low | 0% | 4% |
| Charlotte | Low | 0% | 7% |
| Manatee | Low | 0% | 2% |
| Washington | Low | 0% | 2% |
| Bay | Low | 0% | 0% |
| Bradford | Low | 0% | 0% |
| De Soto | Low | 0% | 5% |
| Dixie | Low | 0% | 10% |
| Escambia | Low | 0% | 2% |
| Glades | Low | 0% | 6% |
| Hardee | Low | 0% | 7% |
| Hendry | Low | 0% | 8% |
| Highlands | Low | 0% | 6% |
| Jefferson | Low | 0% | 11% |
| Lafayette | Low | 0% | 2% |
| Madison | Low | 0% | 4% |
| Okeechobee | Low | 0% | 0% |
| Pinellas | Low | 0% | 0% |
| Sarasota | Low | 0% | 3% |
| Union | Low | 0% | 0% |
| Broward | Low | 0% | 1% |
| Palm Beach | Low | 0% | 3% |
| Collier | Low | 0% | 19% |
| Miami-Dade | Low | 0% | 1% |
| Monroe | 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.