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Castine, Ohio
Inside Castine's city limits, a shallow water table limits basements on over 99% of mapped land, higher than 95% of Ohio cities. Shrink-swell clay limits houses without basements on 20%.
That water-table share is close to Darke County's 96%. FEMA's flood data list 4 flood losses since 2016 in ZIP code 45304 overlapping the city.
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
Basement waterproofing in Castine
Basement waterproofing in Castine: a shallow water table limits basements on over 99% of Castine's mapped land, more than in 95% of Ohio cities, and the ZIP code overlapping Castine logged 4 FEMA flood losses since 2016.
Soil under Castine city limits
| Expansive clay (limits slab homes) | 19.9% |
| High water table (limits basements) | 99.6% |
| Septic fields very limited | 99.6% |
| Clay swell (LEP, by area) | 4.1% |
| High-swell land (LEP 6%+) | 3.4% |
| Mapped soil | 50 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.1% 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 20% of the mapped land.
On over 99% of Castine's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates over 99% 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 Castine. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45304 | 100% | 4 | $22,351 |
Homes
Castine has fewer than 100 housing units in the ACS 2020-2024 estimates, too few for reliable shares.
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| West Manchester | 2 mi | 24% | 91% |
| Eldorado | 3 mi | 20% | 99% |
| New Madison | 5 mi | 3% | 61% |
| Arcanum | 6 mi | 34% | 100% |
| Gordon | 6 mi | 45% | 100% |
| Wayne Lakes | 7 mi | under 1% | 14% |
| Verona | 7 mi | 28% | 97% |
| Lewisburg | 7 mi | 5% | 59% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026). Methods · Data status