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Impact, Texas
Inside Impact's city limits, shrink-swell clay limits houses without basements on 57% of mapped land, higher than 63% of Texas cities. A shallow water table limits basements on 0%.
That clay share is above Taylor County's 45%. USDA doesn't rate the 28% of mapped land classed as urban land, so these shares are floors. FEMA's flood data list 7 flood losses since 2016 in ZIP code 79603 overlapping the city.
Data as of October 13, 2026 · sources · in Taylor County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
Foundation repair in Impact
Foundation repair in Impact: shrink-swell clay limits slab homes on 57% of Impact's mapped land, more than in 63% 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 Impact city limits
| Expansive clay (limits slab homes) | 57.0% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 91.6% |
| Clay swell (LEP, by area) | 6.3% |
| High-swell land (LEP 6%+) | 37.1% |
| Urban land, not rated | 28.4% |
| Mapped soil | 55 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Mangum | 38% | n/a |
| Clairemont | 20% | n/a |
| Colorado | 6% | n/a |
| Gageby | 1% | n/a |
| Rowena | under 1% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 6.3% by land area here, and 37% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 57% of the mapped land.
Clay shrinks as it dries: 100% of Taylor County is in drought on the latest map, and 57% of Impact's mapped land has shrink-swell clay.
USDA rates 92% of the land very limited for septic absorption fields.
Drought in Taylor County
100% of Taylor 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 Impact. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 79603 | 100% | 7 | $15,409 |
Homes
Impact has fewer than 100 housing units in the ACS 2020-2024 estimates, too few for reliable shares.
Nearby cities
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026). Methods · Data status