Holly, MI Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Holly in?

Holly is in Oakland County, EPA Zone 2.

Q: How much does radon mitigation cost in Holly?

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

Avg: 4.00 pCi/L

Oakland County

EPA Zone 2

1 user test

Located in Oakland County within the Detroit Metro area, Holly sits on glacial outwash deposits over Paleozoic limestone bedrock typical of southeastern Michigan. The community's housing features a blend of 19th century Victorian homes and post-war suburban development, predominantly with full basements. Current testing shows an average radon level of 4.0 pCi/L in zip code 48442, meeting the EPA action threshold and highlighting the need for comprehensive home testing.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Holly, MI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Holly, MI Radon Mitigation

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

Holly, MI Radon Testing

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

Holly, Michigan Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Holly, MI	0-20 Years	Full Basement	Jan 2022

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

Holly Radon Facts

Key details about the radon risk profile for Holly and the 48442 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Oakland County, MI

Zip Code

48442

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Holly and the 48442 zip code are located in Oakland County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Holly, MI

What is the average radon level in Holly, MI?

Based on 1 user-submitted test, the average radon level in Holly is 4.00 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 Holly in?

Holly and the 48442 zip code are in Oakland County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Holly?

Radon mitigation in Holly 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 Holly?

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