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Thornville, Ohio
Inside Thornville's city limits, a shallow water table limits basements on 87% of mapped land, the highest of 11 cities in Perry County. Shrink-swell clay limits houses without basements on 0%.
That water-table share is above Perry County's 42%. FEMA's flood data list 7 flood losses since 2016 in ZIP code 43076 overlapping the city. Of its 705 homes, 54% were built before 1980; the median dates from 1976.
Data as of October 13, 2026 · sources · in Perry 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 Thornville
Basement waterproofing in Thornville: a shallow water table limits basements on 87% of Thornville's mapped land, more than in 75% of Ohio cities, and the ZIP code overlapping Thornville logged 7 FEMA flood losses since 2016.
In Perry County, 19% of the 31 flood-loss buildings with a recorded foundation type had basements.
About 600 of Thornville's 705 homes are detached houses.
Soil under Thornville city limits
| Expansive clay (limits slab homes) | 0.0% |
| High water table (limits basements) | 87.0% |
| Septic fields very limited | 92.9% |
| Clay swell (LEP, by area) | 4.1% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 340 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Amanda | 41% | 40% |
| Centerburg | 34% | over 99% |
| Bennington | 7% | 99% |
| Pewamo | 3% | 99% |
| Ockley | 3% | 0% |
| Westmoreland | 2% | 0% |
What the numbers mean here
On 87% of Thornville's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 93% of the land very limited for septic absorption fields.
Drought in Perry County
0% of Perry 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 Thornville. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43076 | 100% | 7 | $51,045 |
Homes in Thornville
| Housing units | 705 |
| Median year built | 1976 |
| Built before 1980 | 54% |
| Built 2000 or later | 21% |
| Owner-occupied | 85% |
| Median value, owner-occupied | $247,800 |
| Single-family detached | 88% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Buckeye Lake | 4 mi | 2% | 85% |
| Glenford | 5 mi | 0% | 58% |
| Hebron | 6 mi | 0% | 86% |
| Millersport | 7 mi | 0% | 75% |
| Thurston | 8 mi | 15% | 87% |
| Pleasantville | 8 mi | 0% | 96% |
| Heath | 9 mi | under 1% | 48% |
| Somerset | 9 mi | 1% | 59% |
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