Greendale, WI Radon Levels

Q: What EPA Radon Zone is Greendale in?

Greendale is in Milwaukee County, EPA Zone 2.

Q: How much does radon mitigation cost in Greendale?

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

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

Greendale, WI Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Milwaukee County, WI

Zip Code 53129

Suburban Milwaukee County community Greendale features planned neighborhoods with homes dating primarily to the mid-20th century. Testing data for this 53129 zip code area within the Milwaukee metro is currently limited, despite the EPA Zone 2 moderate-risk classification. Residents should consider radon testing, particularly in homes with finished basements where radon can accumulate.

8.71

pCi/L area average

Above EPA Action Level

Milwaukee County average: 8.71 pCi/L, based on 7 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Greendale 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+

Greendale, WI 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 Greendale, WI

No homeowner tests have been submitted for Greendale 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
Franklin	2.6 mi	6.00 pCi/L	1
Oak Creek	5.7 mi	8.33 pCi/L	3
Milwaukee	8.1 mi	10.00 pCi/L	3
Waukesha	14.0 mi	5.50 pCi/L	2
Waterford	15.8 mi	9.00 pCi/L	2
Menomonee Falls	16.5 mi	6.50 pCi/L	2
Racine	16.8 mi	8.00 pCi/L	1
Pewaukee	17.1 mi	10.00 pCi/L	1

Milwaukee County Radon Profile

Milwaukee County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 4 cities in Milwaukee County average 8.71 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 Milwaukee County.

Radon FAQ for Greendale, WI

What EPA Radon Zone is Greendale in?

Greendale and the 53129 zip code are in Milwaukee County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Greendale?

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

Radon mitigation in Greendale 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 Greendale?

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.