Columbus, OH Radon Mitigation and Testing

Q: What is the average radon level in Columbus, OH?

Based on 3 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Columbus in?

Columbus is in Franklin County, EPA Zone 1.

Q: How much does radon mitigation cost in Columbus?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Avg: 6.00 pCi/L

Franklin County

EPA Zone 1

3 user tests

Based in Delaware County within the Columbus Metro area, this community sits on glacial deposits over Paleozoic sedimentary bedrock typical of central Ohio. Current testing reveals an average radon level of 6.0 pCi/L, which exceeds EPA action guidelines and reflects the region's elevated radon potential. Homeowners in zip code 43240 should strongly consider radon testing and mitigation given these concerning readings.

6.00

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Columbus, OH. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Columbus, OH Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Columbus, OH Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Columbus, Ohio Radon Levels

User-submitted radon test readings from homes in the Columbus area.

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Columbus, OH	21-50 Years	Partial Basement	Oct 2024
5 pCi/L	Columbus, OH	21-50 Years	Full Basement	Nov 2019
4 pCi/L	Columbus, OH	0-20 Years	Full Basement	Apr 2018

Have a radon test result for Columbus? Submit your reading to help other homeowners.

Columbus Radon Facts

Key details about the radon risk profile for Columbus and the 43085 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Franklin County, OH

Zip Code

43085

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Columbus and the 43085 zip code are located in Franklin County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Columbus, OH

What is the average radon level in Columbus, OH?

Based on 3 user-submitted tests, the average radon level in Columbus is 6.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Columbus in?

Columbus and the 43085 zip code are in Franklin County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Columbus?

Radon mitigation in Columbus typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Columbus?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Ohio

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Marietta	8.00 pCi/L	5
Cincinnati	5.20 pCi/L	5
Hilliard	11.75 pCi/L	4
Wilmington	5.25 pCi/L	4
Newark	15.00 pCi/L	3
Athens	11.33 pCi/L	3
Findlay	10.33 pCi/L	3
Perrysburg	9.67 pCi/L	3
Powell	8.33 pCi/L	3
Columbus	6.00 pCi/L	3
Chagrin Falls	4.67 pCi/L	3
Hamilton	10.00 pCi/L	2
Chardon	5.50 pCi/L	2
Strongsville	4.50 pCi/L	2
Maineville	10.00 pCi/L	1
Lancaster	9.00 pCi/L	1
West Chester	9.00 pCi/L	1
Amherst	6.00 pCi/L	1
Chillicothe	6.00 pCi/L	1
Lima	5.00 pCi/L	1