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Adelphi, Ohio
Inside Adelphi's city limits, a shallow water table limits basements on 93% of mapped land, the 2nd-highest of 7 cities in Ross County. Shrink-swell clay limits houses without basements on 3%.
That water-table share is above Ross County's 61%. FEMA's flood data list no flood losses since 2016 in ZIP code 43101 overlapping the city. Of its 163 homes, 74% were built before 1980; the median dates from 1947.
Data as of October 13, 2026 · sources · in Ross 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 Adelphi
Basement waterproofing in Adelphi: a shallow water table limits basements on 93% of Adelphi's mapped land, more than in 82% of Ohio cities.
About 100 of Adelphi's 163 homes are detached houses.
Soil under Adelphi city limits
| Expansive clay (limits slab homes) | 2.6% |
| High water table (limits basements) | 93.0% |
| Septic fields very limited | 96.6% |
| Clay swell (LEP, by area) | 4.4% |
| High-swell land (LEP 6%+) | 0.3% |
| Mapped soil | 174 acres |
What the numbers mean here
On 93% of Adelphi'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 Ross County
0% of Ross 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 Adelphi. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43101 | 100% | 0 | $0 |
Homes in Adelphi
| Housing units | 163 |
| Median year built | 1947 |
| Built before 1980 | 74% |
| Built 2000 or later | 3% |
| Owner-occupied | 55% |
| Median value, owner-occupied | $164,300 |
| Single-family detached | 81% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Laurelville | 1 mi | under 1% | 8% |
| Tarlton | 6 mi | 0% | 27% |
| Kingston | 9 mi | 8% | 100% |
| Stoutsville | 11 mi | 21% | over 99% |
| Amanda | 13 mi | 6% | 40% |
| Circleville | 14 mi | 5% | 34% |
| Sugar Grove | 16 mi | under 1% | 6% |
| Chillicothe | 16 mi | 3% | 31% |
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