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Santa Anna, Texas
Inside Santa Anna's city limits, shrink-swell clay limits houses without basements on 47% of mapped land, the 3rd-highest of 3 cities in Coleman County. A shallow water table limits basements on 0%.
That clay share is close to Coleman County's 48%. FEMA's flood data list no flood losses since 2016 in ZIP code 76878 overlapping the city. Of its 486 homes, 75% were built before 1980; the median dates from 1958.
Data as of October 13, 2026 · sources · in Coleman 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 Santa Anna
Foundation repair in Santa Anna: shrink-swell clay limits slab homes on 47% of Santa Anna's mapped land, more than in 54% of Texas cities.
About 400 of Santa Anna's 486 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 Santa Anna city limits
| Expansive clay (limits slab homes) | 46.9% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 90.2% |
| Clay swell (LEP, by area) | 6.3% |
| High-swell land (LEP 6%+) | 46.6% |
| Mapped soil | 1,274 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Nuvalde | 18% | n/a |
| Leeray | 16% | n/a |
| Valera | 16% | n/a |
| Lindy | 13% | n/a |
| Kavett | 9% | n/a |
| Weymouth | 4% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 6.3% by land area here, and 47% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 47% of the mapped land.
Clay shrinks as it dries: 100% of Coleman County is in drought on the latest map, and 47% of Santa Anna's mapped land has shrink-swell clay.
USDA rates 90% of the land very limited for septic absorption fields.
Drought in Coleman County
100% of Coleman 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 Santa Anna. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76878 | 100% | 0 | $0 |
Homes in Santa Anna
| Housing units | 486 |
| Median year built | 1958 |
| Built before 1980 | 75% |
| Built 2000 or later | 8% |
| Owner-occupied | 54% |
| Median value, owner-occupied | $58,100 |
| Single-family detached | 73% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Coleman | 9 mi | 63% | 0% |
| Bangs | 12 mi | 68% | 1% |
| Brownwood | 21 mi | 46% | 0% |
| Early | 23 mi | 32% | 0% |
| Novice | 25 mi | 68% | under 1% |
| Cross Plains | 29 mi | 79% | 5% |
| Blanket | 32 mi | 26% | 0% |
| Rising Star | 33 mi | 28% | 21% |
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