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Greenville, Ohio
Inside Greenville's city limits, a shallow water table limits basements on 92% of mapped land, higher than 81% of Ohio cities. Shrink-swell clay limits houses without basements on 9%.
That water-table share is close to Darke County's 96%. FEMA's flood data list 2 flood losses since 2016 in ZIP code 45331 overlapping the city. Of its 6,393 homes, 75% were built before 1980; the median dates from 1959.
Data as of October 13, 2026 · sources · in Darke 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 Greenville
Basement waterproofing in Greenville: a shallow water table limits basements on 92% of Greenville's mapped land, more than in 81% of Ohio cities, and the ZIP code overlapping Greenville logged 2 FEMA flood losses since 2016.
About 4,000 of Greenville's 6,393 homes are detached houses.
Soil under Greenville city limits
| Expansive clay (limits slab homes) | 9.4% |
| High water table (limits basements) | 92.3% |
| Septic fields very limited | 96.4% |
| Clay swell (LEP, by area) | 4.5% |
| High-swell land (LEP 6%+) | 1.9% |
| Mapped soil | 4,231 acres |
What the numbers mean here
On 92% of Greenville's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 96% of the land very limited for septic absorption fields.
Drought in Darke County
0% of Darke 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 Greenville. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45331 | 100% | 2 | $4,052 |
Homes in Greenville
| Housing units | 6,393 |
| Median year built | 1959 |
| Built before 1980 | 75% |
| Built 2000 or later | 8% |
| Owner-occupied | 53% |
| Median value, owner-occupied | $157,800 |
| Single-family detached | 62% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Wayne Lakes | 6 mi | under 1% | 14% |
| Gettysburg | 7 mi | 2% | 94% |
| Palestine | 8 mi | 1% | 94% |
| Ansonia | 8 mi | 25% | 93% |
| Arcanum | 9 mi | 34% | 100% |
| Bradford | 11 mi | 9% | 86% |
| New Madison | 11 mi | 3% | 61% |
| Pitsburg | 11 mi | 12% | over 99% |
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