Addison, MI Radon Levels

Q: What EPA Radon Zone is Addison in?

Addison is in Lenawee County, EPA Zone 1.

Q: How much does radon mitigation cost in Addison?

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

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

Addison, MI Radon Facts

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

County Lenawee County, MI

Zip Code 49220

Positioned in Lenawee County in southeastern Michigan, Addison occupies glacially-influenced terrain where till deposits over limestone bedrock can facilitate radon gas migration into homes. With testing data for zip code 49220 being limited, residents should prioritize radon testing given Michigan's EPA Zone 1 classification. The region's geological characteristics contribute to elevated radon potential throughout southern Michigan.

7.57

pCi/L area average

Above EPA Action Level

Lenawee County average: 7.57 pCi/L, based on 7 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Addison 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+

Addison, 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 Addison, MI

No homeowner tests have been submitted for Addison 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
Onsted	6.8 mi	6.00 pCi/L	2
Tipton	12.3 mi	4.00 pCi/L	1
Jackson	17.6 mi	7.00 pCi/L	1
Tecumseh	18.3 mi	11.50 pCi/L	2
Spring Arbor	18.6 mi	20.00 pCi/L	1
Clinton	19.3 mi	6.00 pCi/L	1
Grass Lake	19.4 mi	6.00 pCi/L	1
Concord	21.6 mi	5.00 pCi/L	1

Lenawee County Radon Profile

The bedrock and soils beneath Lenawee County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 5 cities in Lenawee County average 7.57 pCi/L across 7 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 Lenawee County.

Radon FAQ for Addison, MI

What EPA Radon Zone is Addison in?

Addison and the 49220 zip code are in Lenawee 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 Addison?

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

Radon mitigation in Addison 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 Addison?

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.