Germantown, WI Radon Levels

Q: What EPA Radon Zone is Germantown in?

Germantown is in Washington County, EPA Zone 1.

Q: How much does radon mitigation cost in Germantown?

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

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

Germantown, WI Radon Facts

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

County Washington County, WI

Zip Code 53022

Situated in Washington County within the Milwaukee metro area, this Wisconsin community lies in a region of glacial deposits that can influence radon levels. While specific testing data for zip code 53022 is currently limited, the area's geological setting warrants homeowner attention. Wisconsin's variable radon conditions make individual testing the only reliable way to determine your home's radon risk.

12.00

pCi/L area average

Above EPA Action Level

Washington County average: 12.00 pCi/L, based on 3 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Germantown 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+

Germantown, 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 Germantown, WI

No homeowner tests have been submitted for Germantown 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
Menomonee Falls	4.1 mi	6.50 pCi/L	2
Mequon	5.9 mi	6.00 pCi/L	1
Thiensville	6.8 mi	5.00 pCi/L	1
Cedarburg	8.2 mi	6.00 pCi/L	1
Grafton	11.0 mi	17.00 pCi/L	1
Slinger	11.4 mi	20.00 pCi/L	1
Pewaukee	12.5 mi	10.00 pCi/L	1
Milwaukee	13.7 mi	10.00 pCi/L	3

Washington County Radon Profile

Because of its underlying geology, Washington County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 3 cities in Washington County average 12.00 pCi/L across 3 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Washington County home regardless of zone or a neighbor's results.

Radon FAQ for Germantown, WI

What EPA Radon Zone is Germantown in?

Germantown and the 53022 zip code are in Washington 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 Germantown?

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

Radon mitigation in Germantown 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 Germantown?

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.