Casco, MI Radon Levels

Q: What EPA Radon Zone is Casco in?

Casco is in St Clair County, EPA Zone Unknown.

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

No homeowner radon tests have been submitted for Casco yet, so readings from the closest cities and the St Clair 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 Casco?

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

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

Casco, MI Radon Facts

EPA Radon Zone Unknown Unknown

County St Clair County, MI

Zip Code 48064

Located in St Clair County within the Detroit Metro area, Casco sits atop glacial deposits and sedimentary bedrock that can influence radon gas migration patterns. This rural community features farmsteads and residential development, many with basement foundations typical of southeastern Michigan construction. With radon testing data currently limited for the 48064 area, homeowners should consider professional testing to establish individual property radon levels.

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 Casco 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+

Casco, 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 Casco, MI

No homeowner tests have been submitted for Casco 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	6.6 mi	10.50 pCi/L	2
Richmond	8.1 mi	2.00 pCi/L	1
Goodells	12.3 mi	4.00 pCi/L	1
Macomb	14.1 mi	3.00 pCi/L	1
Clinton Township	18.0 mi	6.50 pCi/L	2
Washington	18.3 mi	5.00 pCi/L	2
Sterling Heights	22.0 mi	7.00 pCi/L	1
Rochester	25.1 mi	9.00 pCi/L	5

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 Casco, MI

What EPA Radon Zone is Casco in?

Casco and the 48064 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 Casco?

No homeowner radon tests have been submitted for Casco 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 Casco 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 Casco?

Radon mitigation in Casco 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 Casco?

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.