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Harpster, Ohio
Inside Harpster's city limits, a shallow water table limits basements on 95% of mapped land, the 4th-highest of 8 cities in Wyandot County. Shrink-swell clay limits houses without basements on 61%, the highest of 8 cities in Wyandot County.
That water-table share is close to Wyandot County's 90%. FEMA's flood data list no flood losses since 2016 in ZIP code 43323 overlapping the city. Of its 151 homes, 100% were built before 1980; the median dates from 1939 or earlier.
Data as of October 13, 2026 · sources · in Wyandot 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 Harpster
Basement waterproofing in Harpster: a shallow water table limits basements on 95% of Harpster's mapped land, more than in 85% of Ohio cities.
About 100 of Harpster's 151 homes are detached houses.
Soil under Harpster city limits
| Expansive clay (limits slab homes) | 60.7% |
| High water table (limits basements) | 95.0% |
| Septic fields very limited | 95.0% |
| Clay swell (LEP, by area) | 5.8% |
| High-swell land (LEP 6%+) | 54.1% |
| Mapped soil | 1,266 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 5.8% by land area here, and 54% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 61% of the mapped land.
On 95% of Harpster's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 95% of the land very limited for septic absorption fields.
Drought in Wyandot County
0% of Wyandot 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 Harpster. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43323 | 100% | 0 | $0 |
Homes in Harpster
| Housing units | 151 |
| Median year built | 1939 or earlier |
| Built before 1980 | 100% |
| Built 2000 or later | 0% |
| Owner-occupied | 97% |
| Median value, owner-occupied | $137,800 |
| Single-family detached | 96% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Morral | 4 mi | 46% | 94% |
| Upper Sandusky | 6 mi | 10% | 78% |
| Marseilles | 8 mi | 6% | 96% |
| Nevada | 8 mi | 21% | 85% |
| Kirby | 10 mi | 44% | 100% |
| New Bloomington | 11 mi | 78% | 92% |
| Marion | 12 mi | 21% | 60% |
| La Rue | 13 mi | 1% | 39% |
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