Toco, Texas
Inside Toco's city limits, shrink-swell clay limits houses without basements on 86% of mapped land, the highest of 7 cities in Lamar County. A shallow water table limits basements on 0%.
That clay share is above Lamar County's 66%. FEMA's flood data list no flood losses since 2016 in ZIP code 75421 overlapping the city.
Data as of October 13, 2026 · sources · in Lamar County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
Foundation repair in Toco
Foundation repair in Toco: shrink-swell clay limits slab homes on 86% of Toco's mapped land, more than in 93% of Texas cities.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Toco city limits
| Expansive clay (limits slab homes) | 85.5% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 85.5% |
| Clay swell (LEP, by area) | 8.9% |
| High-swell land (LEP 6%+) | 85.5% |
| Mapped soil | 108 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 8.9% by land area here, and 86% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 86% of the mapped land.
Clay shrinks as it dries: 100% of Lamar County is in drought on the latest map, and 86% of Toco's mapped land has shrink-swell clay.
USDA rates 86% of the land very limited for septic absorption fields.
Drought in Lamar County
100% of Lamar County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Toco. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75421 | 100% | 0 | $0 |
Homes
Toco has fewer than 100 housing units in the ACS 2020-2024 estimates, too few for reliable shares.
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Paris | 6 mi | 66% | 27% |
| Roxton | 9 mi | 84% | 13% |
| Reno | 10 mi | 63% | 42% |
| Sun Valley | 13 mi | 28% | 90% |
| Blossom | 15 mi | 58% | 57% |
| Honey Grove | 16 mi | 72% | under 1% |
| Pecan Gap | 19 mi | 77% | 5% |
| Cooper | 20 mi | 90% | 1% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026). Methods · Data status