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Piqua, Ohio
Inside Piqua's city limits, a shallow water table limits basements on 72% of mapped land, the 5th-highest of 12 cities in Miami County. Shrink-swell clay limits houses without basements on 14%.
That water-table share is below Miami County's 81%. FEMA's flood data list 3 flood losses since 2016 in ZIP code 45356 overlapping the city. Of its 9,311 homes, 77% were built before 1980; the median dates from 1953.
Data as of October 13, 2026 · sources · in Miami 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 Piqua
Basement waterproofing in Piqua: a shallow water table limits basements on 72% of Piqua's mapped land, more than in 56% of Ohio cities, and the ZIP code overlapping Piqua logged 3 FEMA flood losses since 2016.
About 7,000 of Piqua's 9,311 homes are detached houses.
Soil under Piqua city limits
| Expansive clay (limits slab homes) | 13.6% |
| High water table (limits basements) | 71.7% |
| Septic fields very limited | 95.2% |
| Clay swell (LEP, by area) | 4.4% |
| High-swell land (LEP 6%+) | 2.3% |
| Mapped soil | 9,012 acres |
What the numbers mean here
On 72% of Piqua's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 95% of the land very limited for septic absorption fields.
Drought in Miami County
0% of Miami 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 Piqua. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45356 | 100% | 3 | $34,309 |
Homes in Piqua
| Housing units | 9,311 |
| Median year built | 1953 |
| Built before 1980 | 77% |
| Built 2000 or later | 8% |
| Owner-occupied | 65% |
| Median value, owner-occupied | $138,600 |
| Single-family detached | 75% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Lockington | 4 mi | 1% | 79% |
| Covington | 6 mi | 15% | 44% |
| Fletcher | 7 mi | 9% | 99% |
| Troy | 7 mi | 13% | 61% |
| Pleasant Hill | 8 mi | 29% | 37% |
| Casstown | 9 mi | 0% | 37% |
| Bradford | 10 mi | 9% | 86% |
| Russia | 11 mi | 31% | 99% |
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