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Canal Winchester, Ohio
Inside Canal Winchester's city limits, a shallow water table limits basements on 85% of mapped land, the 4th-highest of 24 cities in Franklin County. Shrink-swell clay limits houses without basements on 16%, the 4th-highest of 24 cities in Franklin County.
That water-table share is above Franklin County's 71%. FEMA's flood data list 4 flood losses since 2016 in ZIP code 43110 overlapping the city. Of its 3,996 homes, 22% were built before 1980; the median dates from 2001.
Data as of October 13, 2026 · sources · in Franklin 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 Canal Winchester
Basement waterproofing in Canal Winchester: a shallow water table limits basements on 85% of Canal Winchester's mapped land, more than in 71% of Ohio cities, and the ZIP code overlapping Canal Winchester logged 4 FEMA flood losses since 2016.
In Franklin County, 81% of the 176 flood-loss buildings with a recorded foundation type had basements.
About 3,000 of Canal Winchester's 3,996 homes are detached houses.
Soil under Canal Winchester city limits
| Expansive clay (limits slab homes) | 16.0% |
| High water table (limits basements) | 84.6% |
| Septic fields very limited | 92.1% |
| Clay swell (LEP, by area) | 4.2% |
| High-swell land (LEP 6%+) | 1.5% |
| Urban land, not rated | 2.6% |
| Mapped soil | 5,391 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.2% by land area here, and 2% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 16% of the mapped land.
On 85% of Canal Winchester's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 92% of the land very limited for septic absorption fields.
Drought in Franklin County
0% of Franklin 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 Canal Winchester. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43110 | 94% | 4 | $19,048 |
Homes in Canal Winchester
| Housing units | 3,996 |
| Median year built | 2001 |
| Built before 1980 | 22% |
| Built 2000 or later | 53% |
| Owner-occupied | 86% |
| Median value, owner-occupied | $336,100 |
| Single-family detached | 74% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Lithopolis | 2 mi | 6% | 81% |
| Pickerington | 4 mi | 2% | 74% |
| Groveport | 4 mi | 12% | 65% |
| Brice | 5 mi | 5% | 98% |
| Carroll | 6 mi | 2% | 48% |
| Obetz | 7 mi | 10% | 67% |
| Reynoldsburg | 8 mi | 1% | 82% |
| Lockbourne | 9 mi | under 1% | 35% |
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