Saint Clair, MI Radon Levels

Q: What EPA Radon Zone is Saint Clair in?

Saint Clair is in St Clair County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Saint Clair?

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

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

Saint Clair, MI Radon Facts

EPA Radon Zone Unknown Unknown

County St Clair County, MI

Zip Code 48079

Positioned along the St. Clair River in St Clair County as part of the Detroit Metro area, Saint Clair's 48079 zip code features varied geological conditions that can influence radon levels. Testing data is currently limited for this riverside community, though Michigan's glacial soils and bedrock formations can create unpredictable radon conditions. Homeowners should conduct individual radon testing to assess their specific risk, particularly in older homes with basements near the river corridor.

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 Saint Clair 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+

Saint Clair, 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 Saint Clair, MI

No homeowner tests have been submitted for Saint Clair 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
East China	3.7 mi	10.50 pCi/L	2
Goodells	12.2 mi	4.00 pCi/L	1
Richmond	14.5 mi	2.00 pCi/L	1
Macomb	23.1 mi	3.00 pCi/L	1
Clinton Township	26.8 mi	6.50 pCi/L	2
Washington	26.9 mi	5.00 pCi/L	2
Sterling Heights	30.9 mi	7.00 pCi/L	1
Imlay City	31.9 mi	4.00 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 Saint Clair, MI

What EPA Radon Zone is Saint Clair in?

Saint Clair and the 48079 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 Saint Clair?

No homeowner radon tests have been submitted for Saint Clair 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 Saint Clair 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 Saint Clair?

Radon mitigation in Saint Clair 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 Saint Clair?

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.