New Madison, OH Radon Mitigation and Testing

Q: What EPA Radon Zone is New Madison in?

New Madison is in Darke County, EPA Zone 1.

Q: How much does radon mitigation cost in New Madison?

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

Darke County

EPA Zone 1

Situated in Darke County in west-central Ohio, New Madison falls within EPA Zone 1, indicating the state's highest radon potential areas. The region's glacial till deposits over limestone bedrock, combined with traditional Ohio farmhouse construction featuring basements and root cellars, create favorable conditions for radon accumulation. Testing data for zip code 45346 remains limited, making individual property testing essential for understanding radon exposure levels.

New Madison, OH Radon Mitigation

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

New Madison, OH Radon Testing

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

New Madison Radon Facts

Key details about the radon risk profile for New Madison and the 45346 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Darke County, OH

Zip Code

45346

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

New Madison and the 45346 zip code are located in Darke 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 New Madison, OH

What EPA Radon Zone is New Madison in?

New Madison and the 45346 zip code are in Darke 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 New Madison?

Radon mitigation in New Madison 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 New Madison?

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