Onsted, MI Radon Mitigation and Testing

Q: What is the average radon level in Onsted, MI?

Based on 2 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Onsted in?

Onsted is in Lenawee County, EPA Zone 1.

Q: How much does radon mitigation cost in Onsted?

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

Lenawee County

EPA Zone 1

2 user tests

Onsted in Lenawee County shows radon levels averaging 6.0 pCi/L based on 2 tests, which exceeds the EPA action threshold of 4.0 pCi/L. Michigan's glacial till soils and limestone bedrock create favorable conditions for radon accumulation in homes with basements and crawl spaces. Testing is strongly recommended for all properties in zip code 49265.

6.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Onsted, MI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Onsted, MI Radon Mitigation

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

Onsted, MI Radon Testing

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

Onsted, Michigan Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Onsted, MI	100+ Years	Partial Basement	Feb 2021
3 pCi/L	Onsted, MI	21-50 Years	Full Basement	Jun 2019

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

Onsted Radon Facts

Key details about the radon risk profile for Onsted and the 49265 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lenawee County, MI

Zip Code

49265

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Onsted and the 49265 zip code are located in Lenawee 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 Onsted, MI

What is the average radon level in Onsted, MI?

Based on 2 user-submitted tests, the average radon level in Onsted 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 Onsted in?

Onsted and the 49265 zip code are in Lenawee 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 Onsted?

Radon mitigation in Onsted 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 Onsted?

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