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Ansonia, Ohio
Inside Ansonia's city limits, a shallow water table limits basements on 93% of mapped land, higher than 82% of Ohio cities. Shrink-swell clay limits houses without basements on 25%.
That water-table share is close to Darke County's 96%. FEMA's flood data list no flood losses since 2016 in ZIP code 45303 overlapping the city. Of its 515 homes, 76% were built before 1980; the median dates from 1959.
Data as of October 13, 2026 · sources · in Darke 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
Basement waterproofing in Ansonia
Basement waterproofing in Ansonia: a shallow water table limits basements on 93% of Ansonia's mapped land, more than in 82% of Ohio cities.
About 400 of Ansonia's 515 homes are detached houses.
Soil under Ansonia city limits
| Expansive clay (limits slab homes) | 25.2% |
| High water table (limits basements) | 93.5% |
| Septic fields very limited | 96.2% |
| Clay swell (LEP, by area) | 4.4% |
| High-swell land (LEP 6%+) | 2.6% |
| Mapped soil | 431 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.4% by land area here, and 3% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 25% of the mapped land.
On 93% of Ansonia's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 96% of the land very limited for septic absorption fields.
Drought in Darke County
0% of Darke 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 Ansonia. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45303 | 100% | 0 | $0 |
Homes in Ansonia
| Housing units | 515 |
| Median year built | 1959 |
| Built before 1980 | 76% |
| Built 2000 or later | 3% |
| Owner-occupied | 70% |
| Median value, owner-occupied | $118,900 |
| Single-family detached | 78% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Rossburg | 5 mi | 21% | over 99% |
| Greenville | 8 mi | 9% | 92% |
| Union City | 8 mi | 18% | over 99% |
| Versailles | 8 mi | 18% | 89% |
| North Star | 8 mi | 28% | 100% |
| New Weston | 9 mi | 15% | 100% |
| Burkettsville | 10 mi | 47% | over 99% |
| Gettysburg | 10 mi | 2% | 94% |
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