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Riverside, Ohio
Inside Riverside's city limits, a shallow water table limits basements on 32% of mapped land. Shrink-swell clay limits houses without basements on 3%.
That water-table share is below Montgomery County's 65%. USDA doesn't rate the 25% of mapped land classed as urban land, so these shares are floors. FEMA's flood data list 10 flood losses since 2016 in the 4 ZIP codes overlapping the city. Of its 11,782 homes, 78% were built before 1980; the median dates from 1963.
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 4 overlapping ZIPs
of homes built before 1980
Basement waterproofing in Riverside
Basement waterproofing in Riverside: a shallow water table limits basements on 32% of Riverside's mapped land, and the 4 ZIP codes overlapping Riverside logged 10 FEMA flood losses since 2016.
In Montgomery County, 65% of the 48 flood-loss buildings with a recorded foundation type had basements.
About 7,400 of Riverside's 11,782 homes are detached houses.
Soil under Riverside city limits
| Expansive clay (limits slab homes) | 3.0% |
| High water table (limits basements) | 31.7% |
| Septic fields very limited | 69.5% |
| Clay swell (LEP, by area) | 4.1% |
| High-swell land (LEP 6%+) | 1.7% |
| Urban land, not rated | 25.4% |
| Mapped soil | 6,250 acres |
What the numbers mean here
On 32% of Riverside's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 69% 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 Riverside. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45431 | 43% | 4 | $29,304 |
| 45424 | 23% | 2 | $0 |
| 45404 | 20% | 1 | $0 |
| 45432 | 13% | 3 | $3,463 |
Homes in Riverside
| Housing units | 11,782 |
| Median year built | 1963 |
| Built before 1980 | 78% |
| Built 2000 or later | 9% |
| Owner-occupied | 56% |
| Median value, owner-occupied | $147,800 |
| Single-family detached | 62% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Dayton | 4 mi | 6% | 28% |
| Beavercreek | 4 mi | 4% | 60% |
| Oakwood | 5 mi | 3% | 16% |
| Huber Heights | 5 mi | 14% | 67% |
| Kettering | 6 mi | 6% | 28% |
| Fairborn | 6 mi | 2% | 32% |
| Vandalia | 8 mi | 11% | 73% |
| Moraine | 9 mi | 3% | 33% |
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