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Harrisburg, Ohio
Inside Harrisburg's city limits, a shallow water table limits basements on 11% of mapped land. Shrink-swell clay limits houses without basements on 0%.
That water-table share is below Franklin County's 71%. FEMA's flood data list no flood losses since 2016 in ZIP code 43126 overlapping the city. Of its 149 homes, 98% were built before 1980; the median dates from 1939 or earlier.
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 Harrisburg
Basement waterproofing in Harrisburg: a shallow water table limits basements on 11% of Harrisburg's mapped land.
In Franklin County, 81% of the 176 flood-loss buildings with a recorded foundation type had basements.
About 100 of Harrisburg's 149 homes are detached houses.
Soil under Harrisburg city limits
| Expansive clay (limits slab homes) | 0.0% |
| High water table (limits basements) | 10.8% |
| Septic fields very limited | 65.7% |
| Clay swell (LEP, by area) | 4.1% |
| High-swell land (LEP 6%+) | 0.0% |
| Urban land, not rated | 17.1% |
| Mapped soil | 98 acres |
What the numbers mean here
USDA rates 66% of the land very limited for septic absorption fields.
With shrink-swell clay on 0% and a shallow water table on 11% of the land, the soil survey points to neither problem across most of Harrisburg; conditions still vary lot by lot.
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 Harrisburg. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43126 | 96% | 0 | $0 |
Homes in Harrisburg
| Housing units | 149 |
| Median year built | 1939 or earlier |
| Built before 1980 | 98% |
| Built 2000 or later | 2% |
| Owner-occupied | 72% |
| Median value, owner-occupied | $183,100 |
| Single-family detached | 82% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Grove City | 7 mi | 17% | 83% |
| Commercial Point | 7 mi | 12% | 85% |
| Urbancrest | 8 mi | 10% | 63% |
| Darbyville | 8 mi | 1% | 41% |
| Mount Sterling | 9 mi | 31% | 91% |
| Lockbourne | 10 mi | under 1% | 35% |
| South Bloomfield | 11 mi | 3% | 30% |
| Valleyview | 12 mi | 0% | 24% |
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