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Caledonia, Ohio
Inside Caledonia's city limits, a shallow water table limits basements on 98% of mapped land, the 2nd-highest of 8 cities in Marion County. Shrink-swell clay limits houses without basements on 15%.
That water-table share is above Marion County's 92%. FEMA's flood data list 1 flood losses since 2016 in ZIP code 43314 overlapping the city. Of its 146 homes, 77% were built before 1980; the median dates from 1949.
Data as of October 13, 2026 · sources · in Marion 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 Caledonia
Basement waterproofing in Caledonia: a shallow water table limits basements on 98% of Caledonia's mapped land, more than in 89% of Ohio cities, and the ZIP code overlapping Caledonia logged 1 FEMA flood losses since 2016.
About 100 of Caledonia's 146 homes are detached houses.
Soil under Caledonia city limits
| Expansive clay (limits slab homes) | 14.6% |
| High water table (limits basements) | 97.6% |
| Septic fields very limited | 99.6% |
| Clay swell (LEP, by area) | 4.6% |
| High-swell land (LEP 6%+) | 5.4% |
| Mapped soil | 156 acres |
What the numbers mean here
On 98% of Caledonia'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 Marion County
0% of Marion 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 Caledonia. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43314 | 100% | 1 | $0 |
Homes in Caledonia
| Housing units | 146 |
| Median year built | 1949 |
| Built before 1980 | 77% |
| Built 2000 or later | 19% |
| Owner-occupied | 95% |
| Median value, owner-occupied | $120,100 |
| Single-family detached | 84% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Edison | 8 mi | 13% | 89% |
| Marion | 9 mi | 21% | 60% |
| Mount Gilead | 9 mi | 1% | 61% |
| Cardington | 10 mi | 12% | 96% |
| Bucyrus | 12 mi | 2% | 72% |
| Galion | 12 mi | under 1% | 76% |
| North Robinson | 12 mi | 1% | 77% |
| Morral | 13 mi | 46% | 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