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Carbon, Texas
Inside Carbon's city limits, shrink-swell clay limits houses without basements on 9% of mapped land, the 5th-highest of 6 cities in Eastland County. A shallow water table limits basements on 45%, the 2nd-highest of 6 cities in Eastland County.
That clay share is below Eastland County's 30%. FEMA's flood data list no flood losses since 2016 in ZIP code 76435 overlapping the city. Of its 144 homes, 47% were built before 1980; the median dates from 1981.
Data as of October 13, 2026 · sources · in Eastland County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
of homes built before 1980
Foundation repair in Carbon
Foundation repair in Carbon: shrink-swell clay limits slab homes on 9% of Carbon's mapped land.
About 100 of Carbon's 144 homes are detached houses.
| 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 Carbon city limits
| Expansive clay (limits slab homes) | 9.2% |
| High water table (limits basements) | 44.7% |
| Septic fields very limited | 87.6% |
| Clay swell (LEP, by area) | 4.9% |
| High-swell land (LEP 6%+) | 6.7% |
| Mapped soil | 659 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Chaney | 45% | n/a |
| Demona | 22% | n/a |
| Patilo | 14% | n/a |
| Hassee | 9% | n/a |
| Nimrod | 5% | n/a |
| Windthorst | 2% | 37% |
What the numbers mean here
On 45% of Carbon's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 88% of the land very limited for septic absorption fields.
Drought in Eastland County
100% of Eastland 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 Carbon. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76435 | 100% | 0 | $0 |
Homes in Carbon
| Housing units | 144 |
| Median year built | 1981 |
| Built before 1980 | 47% |
| Built 2000 or later | 22% |
| Owner-occupied | 89% |
| Median value, owner-occupied | $84,500 |
| Single-family detached | 76% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Eastland | 9 mi | 40% | 7% |
| Gorman | 10 mi | 3% | 53% |
| Cisco | 12 mi | 31% | 1% |
| Rising Star | 14 mi | 28% | 21% |
| Ranger | 16 mi | 53% | 4% |
| De Leon | 20 mi | 27% | 17% |
| Cross Plains | 22 mi | 79% | 5% |
| Putnam | 23 mi | 80% | 0% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status