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Celina, Ohio
Inside Celina's city limits, a shallow water table limits basements on 67% of mapped land, higher than 51% of Ohio cities. Shrink-swell clay limits houses without basements on 23%.
That water-table share is below Mercer County's 95%. USDA doesn't rate the 27% of mapped land classed as urban land, so these shares are floors. FEMA's flood data list 16 flood losses since 2016 in ZIP code 45822 overlapping the city. Of its 4,970 homes, 66% were built before 1980; the median dates from 1969.
Data as of October 13, 2026 · sources · in Mercer 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 Celina
Basement waterproofing in Celina: a shallow water table limits basements on 67% of Celina's mapped land, more than in 51% of Ohio cities, and the ZIP code overlapping Celina logged 16 FEMA flood losses since 2016.
About 3,400 of Celina's 4,970 homes are detached houses.
Soil under Celina city limits
| Expansive clay (limits slab homes) | 22.7% |
| High water table (limits basements) | 66.9% |
| Septic fields very limited | 66.9% |
| Clay swell (LEP, by area) | 4.9% |
| High-swell land (LEP 6%+) | 2.9% |
| Urban land, not rated | 27.0% |
| Mapped soil | 3,433 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.9% 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 23% of the mapped land.
On 67% of Celina's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 67% of the land very limited for septic absorption fields.
Drought in Mercer County
0% of Mercer 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 Celina. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45822 | 100% | 16 | $353,965 |
Homes in Celina
| Housing units | 4,970 |
| Median year built | 1969 |
| Built before 1980 | 66% |
| Built 2000 or later | 16% |
| Owner-occupied | 66% |
| Median value, owner-occupied | $164,100 |
| Single-family detached | 68% |
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