Custer, MI Radon Levels

Q: What EPA Radon Zone is Custer in?

Custer is in Mason County, EPA Zone 3.

Q: Why are radon readings shown from areas near Custer?

No homeowner radon tests have been submitted for Custer yet, so readings from the closest cities and the Mason 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 Custer?

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

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

Custer, MI Radon Facts

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

County Mason County, MI

Zip Code 49405

Situated in Mason County along Michigan's western shore, Custer sits on glacial deposits and dune sands near Lake Michigan that can affect radon gas movement. Limited testing data exists for this 49405 community, highlighting the need for professional radon assessments. The area's sandy soils and proximity to the Great Lakes can create unique radon accumulation patterns.

7.33

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.33 pCi/L, based on 3 tests from 3 nearby cities. No readings have been submitted for Custer 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+

Custer, 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 Custer?

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Radon Readings Near Custer, MI

No homeowner tests have been submitted for Custer 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
Montague	36.5 mi	3.00 pCi/L	1
Cadillac	43.1 mi	6.00 pCi/L	1
Grant	44.4 mi	13.00 pCi/L	1

Mason County Radon Profile

Local geology places Mason County in EPA Radon Zone 3, where predicted indoor radon averages fall below 2 pCi/L — though no county is risk-free. Few homeowner tests have been logged inside Mason County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Mason County to test, as levels can differ between neighboring homes.

Radon FAQ for Custer, MI

What EPA Radon Zone is Custer in?

Custer and the 49405 zip code are in Mason 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 Custer?

No homeowner radon tests have been submitted for Custer yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Mason County average—are the best available indicator of local conditions until Custer 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 Custer?

Radon mitigation in Custer 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 Custer?

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.