Greene County, Ohio
A shallow water table limits basements on 68% of Greene County's mapped land, a higher share than 80% of US counties. Shrink-swell clay limits houses without basements on 8%.
None of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list 25 flood losses here since 2016. 57% of homes were built before 1980, against 50% nationally; the median home dates from 1976.
Data as of October 13, 2026 · sources
expansive clay: shrink-swell limits slab homes
high water table: limits basements
in drought, October 13, 2026
of homes built before 1980
Soil under Greene County
| Expansive clay (limits slab homes) | 8.1% |
| High water table (limits basements) | 68.5% |
| Septic fields very limited | 91.5% |
| Clay swell (LEP, by area) | 4.3% |
| High-swell land (LEP 6%+) | 0.4% |
| Urban land, not rated | 1.2% |
| Mapped soil | 266,425 acres |
How we count · survey areas OH057 (2025-08-28)
What the numbers mean here
On 68% of Greene County's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
Rain over the 12 months to August 2026: 48.27 in, 5.80 in above the 1991-2020 average year of 42.47 in.
USDA rates 91% of the land very limited for septic absorption fields.
Drought
0% of the county is in drought (D1 or worse) on the October 13, 2026 map. No part of the county was in drought in the last 52 weeks.
| Category, October 13, 2026 | Share of county |
|---|---|
| D0 abnormally dry or worse | 0% |
| D1 moderate drought or worse | 0% |
| D2 severe or worse | 0% |
| D3 extreme or worse | 0% |
| D4 exceptional | 0% |
Flood losses since 2016
25 flood losses since 2016, $608,849 paid. The worst year was 2026, with 5.
| Year | Flood losses |
|---|---|
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 0 |
| 2023 | 1 |
| 2024 | 0 |
| 2025 | 2 |
| 2026 to date | 5 |
Rain
| Average year, 1991-2020 | 42.47 in |
| 12 months to August 2026 | 48.27 in (+5.80) |
| 2025 | 42.65 in (+0.18) |
| Wettest year since 1895 | 2011: 58.75 in |
| Driest year since 1895 | 1934: 26.81 in |
| Days with 1 inch or more, normal at XENIA 6 SSE (6 mi away) | 9.7 |
Homes
| Housing units | 72,391 |
| Median year built | 1976 |
| Built before 1980 | 57% |
| Built 2000 or later | 22% |
| Owner-occupied | 68% |
| Median value, owner-occupied | $252,200 |
| Single-family detached | 72% |
What repairs cost
Published ranges from cost guides, not quotes. More sources, and where they disagree.
Cities in Greene County
| City | Expansive clay | High water table | Homes |
|---|---|---|---|
| Beavercreek | 4% | 60% | 20,352 |
| Bellbrook | 1% | 44% | 3,084 |
| Bowersville | 30% | 100% | 110 |
| Cedarville | 4% | 64% | 625 |
| Clifton | 16% | 57% | 82 |
| Fairborn | 2% | 32% | 17,063 |
| Jamestown | under 1% | 90% | 977 |
| Spring Valley | under 1% | 31% | 199 |
| Xenia | 1% | 28% | 11,820 |
| Yellow Springs | 7% | 66% | 2,043 |
Nearby counties
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Clark County, OH | 17 mi | 17% | 59% |
| Clinton County, OH | 19 mi | 16% | 93% |
| Montgomery County, OH | 21 mi | 17% | 65% |
| Warren County, OH | 23 mi | 10% | 51% |
| Fayette County, OH | 25 mi | 37% | 96% |
| Madison County, OH | 30 mi | 36% | 94% |
| Miami County, OH | 31 mi | 18% | 81% |
| Champaign County, OH | 32 mi | 13% | 83% |
Sources: USDA SSURGO (August 28, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status