Radon levels in ZIP 43209

HighEPA Zone 1

ZIP 43209 (Franklin County, Ohio): predicted long-term basement average of 4.8 pCi/L (model estimate), about 2.2× the average US ZIP (2.2) and about 1.7× the Ohio average (2.8).

Test ZIP 43209 now - and consider a continuous monitor

The model predicts a long-term basement average of 4.8 pCi/L here, at or above the EPA action level of 4. Homes in the same ZIP still vary widely, so a real test is the only way to know your number. A continuous digital monitor shows how your level swings with weather and season, which matters when you're near the action level.

Get a continuous radon monitor →Or start with a short-term test kit

Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.

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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

4.8 ± 0.07

pCi/L predicted basement mean (model SD)

2.4 ± 0.09

pCi/L predicted upstairs mean

4.3 ± 0.07

pCi/L predicted typical screening test

How 43209 compares

Within Franklin County, ZIP 43209 ranks #11 of 38 ZIPs by predicted basement level; the county average is 4.3 pCi/L and its ZIPs run from 2.8 to 5.7. The county is EPA Radon Zone 1. About 27,228 people lived in this ZIP at the 2010 Census.

A screening test in a typical 43209 home is predicted at 4.3 pCi/L, so first-floor living space - not just the basement - can exceed the action level here. Mitigation systems are routine in this range and typically cost $800-$2,500.

Other ZIP codes in Franklin County

Full list on the county page.

ZIP 43209 radon questions

Is radon high in ZIP 43209?
High. The model's predicted long-term basement average for ZIP 43209 is 4.8 pCi/L (SD 0.07), with above-ground floors at 2.4 pCi/L. That is about 2.2× the average US ZIP code (2.2) and close to the Franklin County average of 4.3. It ranks 11 of 38 ZIPs in the county.
Do I need to test my home in 43209?
Yes, now. A predicted average at or above the EPA action level of 4 pCi/L means most homes in 43209 would qualify for mitigation. Use a short-term charcoal kit or a continuous monitor; if the result is 4 or higher, get bids for a mitigation system (typically $800-$2,500).
What EPA radon zone is ZIP 43209 in?
ZIP 43209 lies mostly in Franklin County, which the EPA classifies as Radon Zone 1 (highest potential (predicted average > 4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

ZIP pages are generated for ZIPs predicted at or above 2.5 pCi/L and for the most populous ZIP in each county; all other ZIPs appear in their county table. Methodology.