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Columbus Metro, OH Radon Information

The Columbus Metro metropolitan area in Ohio has a regional average radon level of 10.1 pCi/L based on 39 user-submitted tests. This exceeds the EPA’s recommended action level of 4.0 pCi/L, meaning radon testing and professional mitigation should be a priority for homeowners across the region.

Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and bedrock. In the Columbus Metro area, local geology and common residential construction—particularly homes with basements and crawlspaces—allow radon to seep indoors and accumulate to dangerous concentrations. Particularly high readings have been recorded in communities like Hilliard, Newark, Powell, where professional radon testing and mitigation services are strongly recommended.

Whether you are buying a home, selling a property, or simply want to protect your family, a professional radon test is the only way to know your home’s levels. If elevated radon is found, a licensed mitigation contractor can install a sub-slab depressurization system—typically in one day—to reduce levels by up to 99%. Request a free radon mitigation quote

The regional average is 10.1 pCi/L — above the EPA action level of 4.0 pCi/L. Testing and mitigation are strongly recommended.
10.1
Avg. pCi/L
25
Cities
39
User Tests
Zone 1
EPA Rating
Above EPA Action Level
Below EPA Action Level

Top 5 Radon Hotspots in the Columbus Metro Area

Cities with the highest average user-submitted radon readings in the Columbus Metro metropolitan area.

Rank City Avg. Radon Level Tests
1 Hilliard
11.80 pCi/L
4
2 Newark
15.00 pCi/L
3
3 Powell
8.30 pCi/L
3
4 Columbus
6.00 pCi/L
3
5 Granville
15.00 pCi/L
2

Other Metro Areas in Ohio

Explore radon data for other metropolitan regions across the state.

Akron Metro
View radon data
Canton Metro
View radon data
Cincinnati Metro
View radon data
Cleveland Metro
View radon data
Dayton Metro
View radon data
Huntington Metro
View radon data
Toledo Metro
View radon data
Youngstown Metro
View radon data

Cities in the Columbus Metro Area

25 cities and towns in the Columbus Metro metropolitan area with user-submitted radon data.

25 cities

Radon Mitigation Professionals Serving the Columbus Metro Area

Licensed contractors who serve this metro area.

Company
Aadvanced Aair
Aggressive Environmental Services LLC
Best Test Radon Detection Services
Compass Property Service LLC
Cox-Colvin & Associates Inc
CSI for Homes
Environ
Environmental Consultations LLC
Environmental Home Solutions LLC
Exceptional 1 Radon Services LLC
Fox Engineering Tech Services
H To H Services LLC
Ohio Radon Mitigation LLC
Professional Property Inspection
Radon Be Gone
Radon Be Gone
Radon Plus Inspections
Radon Stop LLC
Radon Systems

Frequently Asked Questions about Radon in the Columbus Metro Area

Common questions about radon testing, mitigation costs, and health risks for homeowners in the Columbus Metro metropolitan area.

Why are radon levels so high in the Columbus Metro area?
Radon levels in the Columbus Metro area are driven by the local soil and bedrock composition, which contains naturally occurring uranium. As uranium decays, it produces radon gas that migrates upward through the soil and enters homes through foundation cracks, sump pits, and gaps around pipes. Homes with basements and crawlspaces are especially susceptible because these below-grade spaces are in direct contact with the soil where radon concentrations are highest.
How much does radon mitigation cost in Columbus Metro?
Professional radon mitigation in the Columbus Metro metropolitan area typically costs between $800 and $2,500, depending on the size and construction of your home. The most common approach is an active sub-slab depressurization system, which a certified contractor can usually install in a single day. Ongoing energy costs for the mitigation fan are minimal—roughly $5–$10 per month—and most systems reduce radon levels by 90% or more.
Are landlords in Ohio required to test for radon?
Radon testing and disclosure requirements vary by state and municipality. Some Ohio jurisdictions require landlords to disclose known radon levels or test results, while others have no mandate. Regardless of local law, the EPA recommends radon testing for all residential properties—including rentals—since radon is the second leading cause of lung cancer in the United States.
Can I sell a house with high radon levels in the Columbus Metro area?
Yes. High radon levels do not prevent a home sale, but buyers in the Columbus Metro market routinely request radon testing during the inspection period. If levels exceed 4.0 pCi/L, the buyer may negotiate for the seller to install a mitigation system before closing. Having a radon mitigation system already in place can actually be a selling point, demonstrating proactive home maintenance and providing documented proof of safe indoor air quality.