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Chelsea, MI Radon Mitigation and Testing

Washtenaw County
EPA Zone 1

Located in Washtenaw County within the Ann Arbor Metro area, Chelsea sits over glacial deposits that can influence radon levels throughout southeastern Michigan. Limited testing data exists for the 48118 zip code, making individual property testing crucial for homeowners. The community's mix of historic and modern homes, many with full basements, warrants professional radon assessment regardless of construction era.

Chelsea, MI Radon Mitigation

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

Chelsea, MI Radon Testing

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

Chelsea Radon Facts

Key details about the radon risk profile for Chelsea and the 48118 zip code area.

EPA Radon Zone
Zone 1 — High Risk
County
Washtenaw County, MI
Zip Code
48118
Predicted Screening Level
> 4.0 pCi/L (Zone 1)

Chelsea and the 48118 zip code are located in Washtenaw 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 Chelsea, MI

What EPA Radon Zone is Chelsea in?
Chelsea and the 48118 zip code are in Washtenaw 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 Chelsea?
Radon mitigation in Chelsea 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 Chelsea?
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.

CityAvg User Radon LevelSubmissions
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