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Green Camp, Ohio
Inside Green Camp's city limits, a shallow water table limits basements on 84% of mapped land, the 5th-highest of 8 cities in Marion County. Shrink-swell clay limits houses without basements on 39%, the 3rd-highest of 8 cities in Marion County.
That water-table share is below Marion County's 92%. FEMA's flood data list 3 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 150 homes, 85% were built before 1980; the median dates from 1955.
Data as of October 13, 2026 · sources · in Marion 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 Green Camp
Basement waterproofing in Green Camp: a shallow water table limits basements on 84% of Green Camp's mapped land, more than in 70% of Ohio cities, and the 2 ZIP codes overlapping Green Camp logged 3 FEMA flood losses since 2016.
About 100 of Green Camp's 150 homes are detached houses.
Soil under Green Camp city limits
| Expansive clay (limits slab homes) | 39.4% |
| High water table (limits basements) | 83.6% |
| Septic fields very limited | 90.2% |
| Clay swell (LEP, by area) | 4.7% |
| High-swell land (LEP 6%+) | 6.0% |
| Mapped soil | 217 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Del Rey | 39% | n/a |
| Sloan | 34% | n/a |
| Milford | 8% | n/a |
| Nolin | 7% | n/a |
| Fitchville | 3% | 96% |
| Shinrock | 2% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 4.7% by land area here, and 6% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 39% of the mapped land.
On 84% of Green Camp's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 90% of the land very limited for septic absorption fields.
Drought in Marion County
0% of Marion 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 Green Camp. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 43322 | 88% | 0 | $0 |
| 43302 | 13% | 3 | $11,261 |
Homes in Green Camp
| Housing units | 150 |
| Median year built | 1955 |
| Built before 1980 | 85% |
| Built 2000 or later | 3% |
| Owner-occupied | 85% |
| Median value, owner-occupied | $123,300 |
| Single-family detached | 93% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Prospect | 6 mi | 16% | 72% |
| Marion | 6 mi | 21% | 60% |
| New Bloomington | 7 mi | 78% | 92% |
| Waldo | 8 mi | 22% | 98% |
| Richwood | 9 mi | 7% | 86% |
| La Rue | 10 mi | 1% | 39% |
| Morral | 11 mi | 46% | 94% |
| Magnetic Springs | 13 mi | 25% | 97% |
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