Mass City, MI Radon Levels

Q: What EPA Radon Zone is Mass City in?

Mass City is in Ontonagon County, EPA Zone 3.

Q: Why are radon readings shown from areas near Mass City?

No homeowner radon tests have been submitted for Mass City yet, so readings from the closest cities and the Ontonagon County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Mass City?

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

Check local Mass City radon levels and find certified testing and mitigation professionals to keep your home safe

Mass City, MI Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Ontonagon County, MI

Zip Code 49948

Situated in rural Ontonagon County in Michigan's Upper Peninsula, Mass City sits atop Precambrian bedrock formations that typically produce lower radon levels. Testing data for the 49948 zip code area is currently limited, making professional radon testing especially important for local homeowners. The community's mix of older homes and seasonal cabins may have varying foundation types that could affect radon accumulation patterns.

6.60

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.60 pCi/L, based on 5 tests from 5 nearby cities. No readings have been submitted for Mass City yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Mass City, MI Radon Mitigation

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

Need Radon Mitigation or Testing in Mass City?

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Radon Readings Near Mass City, MI

No homeowner tests have been submitted for Mass City yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Calumet	28.9 mi	7.00 pCi/L	1
Houghton	34.9 mi	3.00 pCi/L	1
Hancock	35.8 mi	5.00 pCi/L	1
Marquette	39.0 mi	8.00 pCi/L	1
Marenisco	39.8 mi	10.00 pCi/L	1

Ontonagon County Radon Profile

Ontonagon County is classified as EPA Radon Zone 3, the lowest predicted-risk tier, with modeled indoor screening averages below 2 pCi/L. User-submitted readings are still sparse within Ontonagon County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Ontonagon County.

Radon FAQ for Mass City, MI

What EPA Radon Zone is Mass City in?

Mass City and the 49948 zip code are in Ontonagon 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.

Why are radon readings shown from areas near Mass City?

No homeowner radon tests have been submitted for Mass City yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Ontonagon County average—are the best available indicator of local conditions until Mass City homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Mass City?

Radon mitigation in Mass City 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 Mass City?

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.