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Sardinia, Ohio
Inside Sardinia's city limits, a shallow water table limits basements on 81% of mapped land, higher than 66% of Ohio cities. Shrink-swell clay limits houses without basements on 16%, the 3rd-highest of 9 cities in Brown County.
That water-table share is above Brown County's 68%. FEMA's flood data list no flood losses since 2016 in ZIP code 45171 overlapping the city. Of its 436 homes, 62% were built before 1980; the median dates from 1958.
Data as of October 13, 2026 · sources · in Brown 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 Sardinia
Basement waterproofing in Sardinia: a shallow water table limits basements on 81% of Sardinia's mapped land, more than in 66% of Ohio cities.
About 300 of Sardinia's 436 homes are detached houses.
Soil under Sardinia city limits
| Expansive clay (limits slab homes) | 15.7% |
| High water table (limits basements) | 81.3% |
| Septic fields very limited | 96.5% |
| Clay swell (LEP, by area) | 4.9% |
| High-swell land (LEP 6%+) | 31.6% |
| Mapped soil | 1,123 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Rossmoyne | 19% | 96% |
| Westboro | 17% | n/a |
| Jonesboro | 17% | n/a |
| Bonnell | 15% | n/a |
| Clermont | 13% | n/a |
| Schaffer | 9% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 4.9% by land area here, and 32% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 16% of the mapped land.
On 81% of Sardinia's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 97% of the land very limited for septic absorption fields.
Drought in Brown County
0% of Brown 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 Sardinia. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45171 | 100% | 0 | $0 |
Homes in Sardinia
| Housing units | 436 |
| Median year built | 1958 |
| Built before 1980 | 62% |
| Built 2000 or later | 5% |
| Owner-occupied | 66% |
| Median value, owner-occupied | $99,600 |
| Single-family detached | 59% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Mowrystown | 4 mi | 1% | 80% |
| Mount Orab | 7 mi | 9% | 92% |
| Winchester | 9 mi | 0% | 63% |
| Russellville | 10 mi | 10% | 86% |
| Georgetown | 11 mi | 8% | 87% |
| Hamersville | 12 mi | 3% | 100% |
| Seaman | 14 mi | 0% | 75% |
| Williamsburg | 14 mi | 3% | 66% |
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