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Casstown, Ohio
Inside Casstown's city limits, a shallow water table limits basements on 37% of mapped land. Shrink-swell clay limits houses without basements on 0%.
That water-table share is below Miami County's 81%. FEMA's flood data list no flood losses since 2016 in ZIP code 45312 overlapping the city. Of its 118 homes, 91% were built before 1980; the median dates from 1939 or earlier.
Data as of October 13, 2026 · sources · in Miami 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 Casstown
Basement waterproofing in Casstown: a shallow water table limits basements on 37% of Casstown's mapped land.
About 100 of Casstown's 118 homes are detached houses.
Soil under Casstown city limits
| Expansive clay (limits slab homes) | 0.0% |
| High water table (limits basements) | 37.4% |
| Septic fields very limited | 93.4% |
| Clay swell (LEP, by area) | 4.5% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 62 acres |
What the numbers mean here
On 37% of Casstown's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 93% of the land very limited for septic absorption fields.
Drought in Miami County
0% of Miami 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 Casstown. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45312 | 100% | 0 | $0 |
Homes in Casstown
| Housing units | 118 |
| Median year built | 1939 or earlier |
| Built before 1980 | 91% |
| Built 2000 or later | 9% |
| Owner-occupied | 82% |
| Median value, owner-occupied | $110,600 |
| Single-family detached | 97% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Troy | 5 mi | 13% | 61% |
| Christiansburg | 5 mi | 24% | over 99% |
| Fletcher | 6 mi | 9% | 99% |
| Tipp City | 7 mi | 18% | 56% |
| Piqua | 9 mi | 14% | 72% |
| New Carlisle | 9 mi | 44% | 32% |
| St. Paris | 10 mi | 21% | 99% |
| North Hampton | 11 mi | 11% | 77% |
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