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Vandalia, Ohio
Inside Vandalia's city limits, a shallow water table limits basements on 73% of mapped land, higher than 58% of Ohio cities. Shrink-swell clay limits houses without basements on 11%.
That water-table share is above Montgomery County's 65%. FEMA's flood data list 4 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 6,819 homes, 70% were built before 1980; the median dates from 1973.
Data as of October 13, 2026 · sources · in Montgomery County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 2 overlapping ZIPs
of homes built before 1980
Basement waterproofing in Vandalia
Basement waterproofing in Vandalia: a shallow water table limits basements on 73% of Vandalia's mapped land, more than in 58% of Ohio cities, and the 2 ZIP codes overlapping Vandalia logged 4 FEMA flood losses since 2016.
In Montgomery County, 65% of the 48 flood-loss buildings with a recorded foundation type had basements.
About 4,700 of Vandalia's 6,819 homes are detached houses.
Soil under Vandalia city limits
| Expansive clay (limits slab homes) | 10.9% |
| High water table (limits basements) | 73.2% |
| Septic fields very limited | 90.7% |
| Clay swell (LEP, by area) | 4.4% |
| High-swell land (LEP 6%+) | 1.2% |
| Urban land, not rated | 4.2% |
| Mapped soil | 7,913 acres |
What the numbers mean here
On 73% of Vandalia's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 91% of the land very limited for septic absorption fields.
Drought in Montgomery County
0% of Montgomery 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 Vandalia. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45377 | 64% | 1 | $0 |
| 45414 | 26% | 3 | $80,390 |
Homes in Vandalia
| Housing units | 6,819 |
| Median year built | 1973 |
| Built before 1980 | 70% |
| Built 2000 or later | 4% |
| Owner-occupied | 64% |
| Median value, owner-occupied | $197,000 |
| Single-family detached | 68% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Huber Heights | 4 mi | 14% | 67% |
| Tipp City | 6 mi | 18% | 56% |
| Englewood | 6 mi | 24% | 66% |
| Dayton | 7 mi | 6% | 28% |
| Union | 7 mi | 18% | 50% |
| Clayton | 7 mi | 15% | 84% |
| Riverside | 8 mi | 3% | 32% |
| West Milton | 9 mi | 21% | 38% |
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