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Centerburg, Ohio
Inside Centerburg's city limits, a shallow water table limits basements on 97% of mapped land, the highest of 7 cities in Knox County. Shrink-swell clay limits houses without basements on under 1%.
That water-table share is above Knox County's 65%. FEMA's flood data list 10 flood losses since 2016 in ZIP code 43011 overlapping the city. Of its 713 homes, 63% were built before 1980; the median dates from 1958.
Data as of October 13, 2026 · sources · in Knox 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 Centerburg
Basement waterproofing in Centerburg: a shallow water table limits basements on 97% of Centerburg's mapped land, more than in 88% of Ohio cities, and the ZIP code overlapping Centerburg logged 10 FEMA flood losses since 2016.
About 500 of Centerburg's 713 homes are detached houses.
Soil under Centerburg city limits
| Expansive clay (limits slab homes) | under 0.1% |
| High water table (limits basements) | 96.7% |
| Septic fields very limited | 99.1% |
| Clay swell (LEP, by area) | 3.7% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 623 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Centerburg | 37% | over 99% |
| Bennington | 24% | 99% |
| Pewamo | 11% | 99% |
| Amanda | 5% | 40% |
| Medway | 4% | n/a |
| Condit | 4% | n/a |
What the numbers mean here
On 97% of Centerburg's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 99% of the land very limited for septic absorption fields.
Drought in Knox County
0% of Knox 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 Centerburg. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43011 | 100% | 10 | $90,876 |
Homes in Centerburg
| Housing units | 713 |
| Median year built | 1958 |
| Built before 1980 | 63% |
| Built 2000 or later | 29% |
| Owner-occupied | 65% |
| Median value, owner-occupied | $246,900 |
| Single-family detached | 74% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Hartford (Croton) | 4 mi | 0% | 90% |
| Sparta | 6 mi | 8% | 45% |
| Marengo | 9 mi | 0% | 97% |
| Sunbury | 10 mi | 15% | 92% |
| Johnstown | 11 mi | 2% | 87% |
| Galena | 11 mi | 8% | 80% |
| Chesterville | 12 mi | 0% | 14% |
| Fulton | 13 mi | 0% | 95% |
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