Columbus, MI Radon Levels

Q: What EPA Radon Zone is Columbus in?

Columbus is in St Clair County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Columbus?

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

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

Columbus, MI Radon Facts

EPA Radon Zone Unknown Unknown

County St Clair County, MI

Zip Code 48063

Columbus in St. Clair County represents the Detroit metro's eastern reaches, where Michigan's glacial deposits over sedimentary bedrock can create variable radon conditions depending on specific soil composition. Testing data for zip code 48063 remains insufficient for area-wide assessment, emphasizing the importance of individual property testing. The region's typical full basement construction and clay soil conditions can facilitate radon accumulation in some locations.

8.33

pCi/L area average

Above EPA Action Level

St Clair County average: 8.33 pCi/L, based on 3 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Columbus 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+

Columbus, 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 Columbus?

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Radon Readings Near Columbus, MI

No homeowner tests have been submitted for Columbus 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
Goodells	4.0 mi	4.00 pCi/L	1
Richmond	7.5 mi	2.00 pCi/L	1
East China	10.0 mi	10.50 pCi/L	2
Macomb	20.0 mi	3.00 pCi/L	1
Washington	21.0 mi	5.00 pCi/L	2
Imlay City	23.0 mi	4.00 pCi/L	1
Clinton Township	24.7 mi	6.50 pCi/L	2
Sterling Heights	27.9 mi	7.00 pCi/L	1

St Clair County Radon Profile

St Clair County has not been assigned a definitive EPA radon zone, so the agency recommends that every home be tested regardless of predicted risk. Homeowner-submitted tests from 3 cities in St Clair County average 8.33 pCi/L across 3 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. 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 St Clair County.

Radon FAQ for Columbus, MI

What EPA Radon Zone is Columbus in?

Columbus and the 48063 zip code are in St Clair County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

Why are radon readings shown from areas near Columbus?

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

Radon mitigation in Columbus 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 Columbus?

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.