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Moulton, Texas
Inside Moulton's city limits, shrink-swell clay limits houses without basements on 30% of mapped land, the 4th-highest of 4 cities in Lavaca County. A shallow water table limits basements on 2%, the 3rd-highest of 4 cities in Lavaca County.
That clay share is below Lavaca County's 48%. FEMA's flood data list no flood losses since 2016 in ZIP code 77975 overlapping the city. Of its 471 homes, 75% were built before 1980; the median dates from 1965.
Data as of October 13, 2026 · sources · in Lavaca 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 Moulton
Foundation repair in Moulton: shrink-swell clay limits slab homes on 30% of Moulton's mapped land.
About 400 of Moulton's 471 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 Moulton city limits
| Expansive clay (limits slab homes) | 30.2% |
| High water table (limits basements) | 2.4% |
| Septic fields very limited | 79.3% |
| Clay swell (LEP, by area) | 5.9% |
| High-swell land (LEP 6%+) | 30.2% |
| Mapped soil | 535 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Carbengle | 44% | n/a |
| Frelsburg | 22% | 93% |
| Cuero | 11% | n/a |
| Greenvine | 7% | n/a |
| Brenham | 3% | n/a |
| Bleiblerville | 3% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 5.9% by land area here, and 30% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 30% of the mapped land.
Clay shrinks as it dries: 100% of Lavaca County is in drought on the latest map, and 30% of Moulton's mapped land has shrink-swell clay.
USDA rates 79% of the land very limited for septic absorption fields.
Drought in Lavaca County
100% of Lavaca 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 Moulton. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77975 | 100% | 0 | $0 |
Homes in Moulton
| Housing units | 471 |
| Median year built | 1965 |
| Built before 1980 | 75% |
| Built 2000 or later | 9% |
| Owner-occupied | 69% |
| Median value, owner-occupied | $159,800 |
| Single-family detached | 83% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Flatonia | 9 mi | 96% | 4% |
| Shiner | 10 mi | 37% | 11% |
| Waelder | 12 mi | 76% | 0% |
| Hallettsville | 15 mi | 77% | 35% |
| Schulenburg | 16 mi | 65% | 13% |
| Gonzales | 19 mi | 52% | under 1% |
| Yoakum | 19 mi | 86% | 2% |
| Weimar | 24 mi | 68% | 2% |
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