Union, MI Radon Levels

Q: What EPA Radon Zone is Union in?

Union is in Cass County, EPA Zone 1.

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

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

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

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

Union, MI Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Cass County, MI

Zip Code 49130

Located in southwestern Michigan's Cass County, Union sits within the South Bend Metro area where glacial deposits create favorable conditions for radon accumulation. Testing data for this zip code 49130 community remains limited, making professional radon testing essential for local homeowners. Given the region's geological characteristics and EPA Zone 1 classification, residents should prioritize radon testing to ensure indoor air safety.

4.54

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 4.54 pCi/L, based on 11 tests from 8 nearby cities. No readings have been submitted for Union 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+

Union, 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 Union, MI

No homeowner tests have been submitted for Union 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
Three Rivers	16.5 mi	6.00 pCi/L	2
Paw Paw	31.3 mi	4.00 pCi/L	1
Portage	31.5 mi	3.33 pCi/L	3
Mattawan	32.1 mi	4.00 pCi/L	1
Saint Joseph	37.6 mi	2.00 pCi/L	1
Coloma	37.7 mi	6.00 pCi/L	1
Coldwater	44.7 mi	9.00 pCi/L	1
Ceresco	48.2 mi	3.00 pCi/L	1

Cass County Radon Profile

Cass County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Few homeowner tests have been logged inside Cass 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 Cass County to test, as levels can differ between neighboring homes.

Radon FAQ for Union, MI

What EPA Radon Zone is Union in?

Union and the 49130 zip code are in Cass County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Union?

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

Radon mitigation in Union 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 Union?

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.