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New Boston, Texas
Inside New Boston's city limits, shrink-swell clay limits houses without basements on 36% of mapped land, the highest of 10 cities in Bowie County. A shallow water table limits basements on 74%, the 5th-highest of 10 cities in Bowie County.
That clay share is close to Bowie County's 32%. FEMA's flood data list 3 flood losses since 2016 in ZIP code 75570 overlapping the city. Of its 2,149 homes, 53% were built before 1980; the median dates from 1978.
Data as of October 13, 2026 · sources · in Bowie 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 New Boston
Foundation repair in New Boston: shrink-swell clay limits slab homes on 36% of New Boston's mapped land.
About 1,600 of New Boston's 2,149 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 New Boston city limits
| Expansive clay (limits slab homes) | 36.0% |
| High water table (limits basements) | 74.1% |
| Septic fields very limited | 77.2% |
| Clay swell (LEP, by area) | 6.2% |
| High-swell land (LEP 6%+) | 60.7% |
| Urban land, not rated | 2.6% |
| Mapped soil | 2,725 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Alusa | 30% | n/a |
| Sawyer | 26% | n/a |
| Annona | 8% | n/a |
| Adaton | 8% | n/a |
| Blevins | 7% | n/a |
| Eylau | 5% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 6.2% by land area here, and 61% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 36% of the mapped land.
Clay shrinks as it dries: 100% of Bowie County is in drought on the latest map, and 36% of New Boston's mapped land has shrink-swell clay.
On 74% of New Boston's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 77% of the land very limited for septic absorption fields.
Drought in Bowie County
100% of Bowie 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 New Boston. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75570 | 100% | 3 | $46,525 |
Homes in New Boston
| Housing units | 2,149 |
| Median year built | 1978 |
| Built before 1980 | 53% |
| Built 2000 or later | 17% |
| Owner-occupied | 66% |
| Median value, owner-occupied | $111,500 |
| Single-family detached | 75% |
Nearby cities
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