Harsens Island, MI Radon Mitigation and Testing

Q: What EPA Radon Zone is Harsens Island in?

Harsens Island is in St Clair County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Harsens Island?

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

St Clair County

EPA Zone Unknown

This unique St. Clair River island community in St Clair County sits on sandy deltaic soils that typically limit radon accumulation. The Detroit metro area's mix of seasonal cottages and year-round homes often feature minimal basements or crawl spaces. Though comprehensive testing data is unavailable, the island's sandy soils and water-surrounded location generally create lower radon risk compared to mainland Michigan communities.

Harsens Island, MI Radon Mitigation

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

Harsens Island, MI Radon Testing

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

Harsens Island Radon Facts

Key details about the radon risk profile for Harsens Island and the 48028 zip code area.

EPA Radon Zone

Unknown

County

St Clair County, MI

Zip Code

48028

Predicted Screening Level

Unknown

Harsens Island and the 48028 zip code are located in St Clair County, which has an EPA assigned Radon Zone of Unknown. A radon zone of Unknown does not have sufficient data for classification. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Harsens Island, MI

What EPA Radon Zone is Harsens Island in?

Harsens Island and the 48028 zip code are in St Clair County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

How much does radon mitigation cost in Harsens Island?

Radon mitigation in Harsens Island 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 Harsens Island?

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