Sumner, MI Radon Levels

Q: What EPA Radon Zone is Sumner in?

Sumner is in Gratiot County, EPA Zone 3.

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

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

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

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

Sumner, MI Radon Facts

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

County Gratiot County, MI

Zip Code 48889

Positioned in Gratiot County within the Grand Rapids Metro area (zip code 48889), Sumner lies atop glacial deposits that characterize much of Michigan's lower peninsula. With limited local testing data available, homeowners should conduct individual radon measurements to understand their property's risk level. Michigan's glacial terrain creates variable soil conditions that can influence radon gas movement unpredictably.

3.00

pCi/L area average

Below EPA Action Level

Gratiot County average: 3.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Sumner itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Sumner, MI Radon Mitigation

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

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Radon Readings Near Sumner, MI

No homeowner tests have been submitted for Sumner 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
Ithaca	9.3 mi	3.00 pCi/L	1
Saranac	33.1 mi	4.00 pCi/L	1
Dewitt	33.9 mi	20.00 pCi/L	1
Sunfield	38.5 mi	6.00 pCi/L	1
Grand Ledge	38.5 mi	7.00 pCi/L	2
Rockford	38.8 mi	5.00 pCi/L	1
Saginaw	41.3 mi	12.50 pCi/L	2
Lansing	41.7 mi	5.00 pCi/L	1

Gratiot County Radon Profile

Gratiot County is classified as EPA Radon Zone 3, the lowest predicted-risk tier, with modeled indoor screening averages below 2 pCi/L. Homeowner-submitted tests from 1 city in Gratiot County average 3.00 pCi/L across 1 test — below the EPA's 4 pCi/L action level, though radon varies sharply from home to home. 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 Gratiot County.

Radon FAQ for Sumner, MI

What EPA Radon Zone is Sumner in?

Sumner and the 48889 zip code are in Gratiot 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 Sumner?

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

Radon mitigation in Sumner 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 Sumner?

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.