Marion, MI Radon Mitigation and Testing

Q: What EPA Radon Zone is Marion in?

Marion is in Clare County, EPA Zone 3.

Q: How much does radon mitigation cost in Marion?

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

Clare County

EPA Zone 3

Situated in Clare County in Michigan's north-central region, Marion sits atop glacial deposits left by ancient ice sheets that can influence radon migration patterns. Limited testing data makes it challenging to establish local radon trends for this community. Given Michigan's variable radon potential across different geological formations, homeowners should prioritize professional testing to establish baseline readings.

Marion, MI Radon Mitigation

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

Marion, MI Radon Testing

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

Marion Radon Facts

Key details about the radon risk profile for Marion and the 49665 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Clare County, MI

Zip Code

49665

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Marion and the 49665 zip code are located in Clare County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Marion, MI

What EPA Radon Zone is Marion in?

Marion and the 49665 zip code are in Clare County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Marion?

Radon mitigation in Marion 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 Marion?

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 Michigan

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

City	Avg User Radon Level	Submissions
Novi	5.00 pCi/L	7
Rochester	9.00 pCi/L	5
Battle Creek	6.60 pCi/L	5
White Lake	10.00 pCi/L	4
Ypsilanti	8.50 pCi/L	4
Waterford	7.75 pCi/L	4
Howell	7.50 pCi/L	4
Gaylord	6.00 pCi/L	4
Gladstone	5.25 pCi/L	4
West Bloomfield	5.25 pCi/L	4
Clarkston	5.00 pCi/L	4
Flint	9.00 pCi/L	3
Pinckney	7.33 pCi/L	3
Northville	5.33 pCi/L	3
Milford	4.33 pCi/L	3
Plymouth	4.33 pCi/L	3
Portage	3.33 pCi/L	3
Lake Orion	11.00 pCi/L	2
Oxford	11.00 pCi/L	2
Grand Ledge	7.00 pCi/L	2