Port Washington, WI Radon Levels

Q: What EPA Radon Zone is Port Washington in?

Port Washington is in Ozaukee County, EPA Zone 2.

Q: How much does radon mitigation cost in Port Washington?

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

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

Port Washington, WI Radon Facts

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

County Ozaukee County, WI

Zip Code 53074

Found along Lake Michigan's shore in Ozaukee County within the Milwaukee Metro, Port Washington sits on glacial deposits over sedimentary bedrock. While testing data for zip code 53074 is currently limited, homeowners should test given Wisconsin's generally elevated radon potential. The community's lakefront location and glacial geology, combined with traditional Midwest basement construction, create variable conditions for radon accumulation.

8.50

pCi/L area average

Above EPA Action Level

Ozaukee County average: 8.50 pCi/L, based on 4 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Port Washington 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+

Port Washington, 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 Port Washington, WI

No homeowner tests have been submitted for Port Washington 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
Grafton	6.2 mi	17.00 pCi/L	1
Cedarburg	8.9 mi	6.00 pCi/L	1
Mequon	12.1 mi	6.00 pCi/L	1
Thiensville	12.2 mi	5.00 pCi/L	1
West Bend	15.8 mi	8.00 pCi/L	1
Kewaskum	17.9 mi	8.00 pCi/L	1
Menomonee Falls	20.0 mi	6.50 pCi/L	2
Slinger	20.7 mi	20.00 pCi/L	1

Ozaukee County Radon Profile

The soils and bedrock of Ozaukee County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 4 cities in Ozaukee County average 8.50 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Ozaukee County to test, as levels can differ between neighboring homes.

Radon FAQ for Port Washington, WI

What EPA Radon Zone is Port Washington in?

Port Washington and the 53074 zip code are in Ozaukee 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 Port Washington?

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

Radon mitigation in Port Washington 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 Port Washington?

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.