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Covington, Texas
Inside Covington's city limits, shrink-swell clay limits houses without basements on 23% of mapped land. A shallow water table limits basements on 8%, the 2nd-highest of 14 cities in Hill County.
That clay share is below Hill County's 53%. FEMA's flood data list no flood losses since 2016 in ZIP code 76636 overlapping the city. Of its 123 homes, 76% were built before 1980; the median dates from 1960.
Data as of October 13, 2026 · sources · in Hill 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 Covington
Foundation repair in Covington: shrink-swell clay limits slab homes on 23% of Covington's mapped land.
About 100 of Covington's 123 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 Covington city limits
| Expansive clay (limits slab homes) | 23.1% |
| High water table (limits basements) | 8.1% |
| Septic fields very limited | 53.9% |
| Clay swell (LEP, by area) | 4.5% |
| High-swell land (LEP 6%+) | 35.3% |
| Mapped soil | 532 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Gasil | 21% | 0% |
| Silstid | 14% | n/a |
| Culp | 13% | n/a |
| Blum | 12% | n/a |
| Pursley | 6% | n/a |
| Coving | 6% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 4.5% by land area here, and 35% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 23% of the mapped land.
Clay shrinks as it dries: 100% of Hill County is in drought on the latest map, and 23% of Covington's mapped land has shrink-swell clay.
USDA rates 54% of the land very limited for septic absorption fields.
Drought in Hill County
100% of Hill 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 Covington. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76636 | 100% | 0 | $0 |
Homes in Covington
| Housing units | 123 |
| Median year built | 1960 |
| Built before 1980 | 76% |
| Built 2000 or later | 12% |
| Owner-occupied | 88% |
| Median value, owner-occupied | $132,500 |
| Single-family detached | 81% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Itasca | 7 mi | 82% | under 1% |
| Rio Vista | 8 mi | 21% | 0% |
| Grandview | 8 mi | 84% | under 1% |
| Blum | 8 mi | 22% | 1% |
| Coyote Flats | 12 mi | 78% | 1% |
| Carl's Corner | 14 mi | 10% | under 1% |
| Hillsboro | 15 mi | 64% | under 1% |
| Cleburne | 15 mi | 52% | 3% |
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