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McComb, Ohio
Inside McComb's city limits, a shallow water table limits basements on 82% of mapped land, higher than 67% of Ohio cities. Shrink-swell clay limits houses without basements on 17%.
That water-table share is below Hancock County's 93%. FEMA's flood data list no flood losses since 2016 in ZIP code 45858 overlapping the city. Of its 592 homes, 73% were built before 1980; the median dates from 1966.
Data as of October 13, 2026 · sources · in Hancock 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 McComb
Basement waterproofing in McComb: a shallow water table limits basements on 82% of McComb's mapped land, more than in 67% of Ohio cities.
In Hancock County, 64% of the 39 flood-loss buildings with a recorded foundation type had basements.
About 500 of McComb's 592 homes are detached houses.
Soil under McComb city limits
| Expansive clay (limits slab homes) | 17.4% |
| High water table (limits basements) | 81.6% |
| Septic fields very limited | 82.3% |
| Clay swell (LEP, by area) | 4.3% |
| High-swell land (LEP 6%+) | 0.6% |
| Urban land, not rated | 2.1% |
| Mapped soil | 690 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.3% by land area here, and 1% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 17% of the mapped land.
On 82% of McComb's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 82% of the land very limited for septic absorption fields.
Drought in Hancock County
0% of Hancock 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 McComb. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45858 | 100% | 0 | $0 |
Homes in McComb
| Housing units | 592 |
| Median year built | 1966 |
| Built before 1980 | 73% |
| Built 2000 or later | 9% |
| Owner-occupied | 77% |
| Median value, owner-occupied | $146,800 |
| Single-family detached | 85% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Hoytville | 6 mi | 83% | 94% |
| Benton Ridge | 7 mi | 21% | 70% |
| Van Buren | 8 mi | 3% | 80% |
| North Baltimore | 8 mi | 37% | 87% |
| Belmore | 9 mi | 89% | 94% |
| Findlay | 9 mi | 15% | 66% |
| Gilboa | 9 mi | 51% | 94% |
| Deshler | 9 mi | 96% | 98% |
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