Plymouth, MI Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 4.30 pCi/L.

Q: What EPA Radon Zone is Plymouth in?

Plymouth is in Wayne County, EPA Zone 3.

Q: How much does radon mitigation cost in Plymouth?

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

Avg: 4.30 pCi/L

Wayne County

EPA Zone 3

3 user tests

Plymouth in Wayne County shows an average radon level of 4.33 pCi/L based on local testing, slightly above the EPA action threshold. This Detroit Metro community in zip code 48170 features predominantly single-family homes with full basements built from the 1950s through 1990s. Residents should consider radon mitigation, especially in finished basement areas where family exposure may be higher.

4.30

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Plymouth, MI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Plymouth, MI Radon Mitigation

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

Plymouth, MI Radon Testing

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

Plymouth, Michigan Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Plymouth, MI	21-50 Years	Full Basement	Jan 2025
6 pCi/L	Plymouth, MI	21-50 Years	Full Basement	Sep 2024
3 pCi/L	Plymouth, MI	51-99 Years	—	Feb 2024

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

Plymouth Radon Facts

Key details about the radon risk profile for Plymouth and the 48170 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Wayne County, MI

Zip Code

48170

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

4.30 pCi/L

User Tests Submitted

Plymouth and the 48170 zip code are located in Wayne 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 Plymouth, MI

What is the average radon level in Plymouth, MI?

Based on 3 user-submitted tests, the average radon level in Plymouth is 4.30 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 Plymouth in?

Plymouth and the 48170 zip code are in Wayne 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 Plymouth?

Radon mitigation in Plymouth 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 Plymouth?

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