88 counties mapped. On average, 4% of Tennessee 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 % |
|---|---|---|---|
| Lake | Severe | 30% | 22% |
| Smith | High | 22% | 34% |
| Trousdale | High | 22% | 38% |
| Bedford | High | 21% | 48% |
| Dyer | High | 20% | 7% |
| Lincoln | High | 18% | 22% |
| Jackson | High | 17% | 15% |
| Rutherford | High | 17% | 50% |
| Lauderdale | High | 17% | 21% |
| Cannon | Moderate | 15% | 22% |
| Moore | Moderate | 11% | 13% |
| Marshall | Moderate | 11% | 48% |
| Wilson | Moderate | 11% | 61% |
| Tipton | Moderate | 8% | 16% |
| Hamilton | Moderate | 8% | 16% |
| Hardeman | Moderate | 6% | 20% |
| Shelby | Moderate | 6% | 7% |
| McNairy | Moderate | 5% | 18% |
| Maury | Moderate | 5% | 33% |
| Meigs | Moderate | 5% | 21% |
| Decatur | Low | 5% | 22% |
| Giles | Low | 5% | 33% |
| Robertson | Low | 5% | 27% |
| Chester | Low | 4% | 10% |
| Sumner | Low | 4% | 23% |
| Hamblen | Low | 4% | 48% |
| Macon | Low | 3% | 12% |
| Rhea | Low | 3% | 15% |
| Clay | Low | 3% | 14% |
| Davidson | Low | 3% | 28% |
| Madison | Low | 3% | 4% |
| Perry | Low | 3% | 8% |
| Williamson | Low | 3% | 31% |
| Roane | Low | 2% | 37% |
| Anderson | Low | 2% | 19% |
| Grundy | Low | 2% | 2% |
| Grainger | Low | 2% | 39% |
| DeKalb | Low | 2% | 32% |
| Overton | Low | 2% | 35% |
| Bledsoe | Low | 2% | 6% |
| Greene | Low | 2% | 26% |
| Coffee | Low | 2% | 29% |
| Franklin | Low | 2% | 26% |
| Hardin | Low | 2% | 29% |
| Washington | Low | 1% | 43% |
| Obion | Low | 1% | 9% |
| Hickman | Low | 1% | 16% |
| Henderson | Low | 1% | 19% |
| Sequatchie | Low | 1% | 2% |
| Cocke | Low | 1% | 27% |
| Carter | Low | 1% | 12% |
| Wayne | Low | 1% | 10% |
| Henry | Low | 0% | 17% |
| Loudon | Low | 0% | 56% |
| Montgomery | Low | 0% | 31% |
| Union | Low | 0% | 26% |
| Blount | Low | 0% | 40% |
| Benton | Low | 0% | 15% |
| Bradley | Low | 0% | 20% |
| Cumberland | Low | 0% | 11% |
| Warren | Low | 0% | 17% |
| Claiborne | Low | 0% | 33% |
| Marion | Low | 0% | 6% |
| Campbell | Low | 0% | 25% |
| Carroll | Low | 0% | 23% |
| Cheatham | Low | 0% | 8% |
| Crockett | Low | 0% | 10% |
| Dickson | Low | 0% | 34% |
| Fayette | Low | 0% | 0% |
| Gibson | Low | 0% | 7% |
| Haywood | Low | 0% | 8% |
| Houston | Low | 0% | 28% |
| Humphreys | Low | 0% | 3% |
| Jefferson | Low | 0% | 54% |
| Johnson | Low | 0% | 3% |
| Knox | Low | 0% | 43% |
| Lawrence | Low | 0% | 5% |
| Lewis | Low | 0% | 10% |
| McMinn | Low | 0% | 25% |
| Monroe | Low | 0% | 27% |
| Polk | Low | 0% | 5% |
| Stewart | Low | 0% | 6% |
| Sullivan | Low | 0% | 32% |
| Unicoi | Low | 0% | 2% |
| Weakley | Low | 0% | 4% |
| Scott | Low | 0% | 13% |
| Sevier | Low | 0% | 32% |
| Morgan | Low | 0% | 9% |
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.