Fredonia, WI Radon Levels

Q: What EPA Radon Zone is Fredonia in?

Fredonia is in Ozaukee County, EPA Zone 2.

Q: How much does radon mitigation cost in Fredonia?

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

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

Fredonia, WI Radon Facts

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

County Ozaukee County, WI

Zip Code 53021

Part of the Milwaukee Metro area in Ozaukee County, Fredonia sits in EPA Zone 2 where comprehensive radon data is still being collected. Wisconsin's glacial geology and the prevalence of full basements in regional housing stock create favorable conditions for radon accumulation. Testing is particularly important for homes in zip code 53021, given the state's documented radon challenges.

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 Fredonia 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+

Fredonia, 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 Fredonia, WI

No homeowner tests have been submitted for Fredonia 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	10.6 mi	17.00 pCi/L	1
West Bend	11.9 mi	8.00 pCi/L	1
Kewaskum	12.0 mi	8.00 pCi/L	1
Cedarburg	12.2 mi	6.00 pCi/L	1
Mequon	16.1 mi	6.00 pCi/L	1
Thiensville	16.7 mi	5.00 pCi/L	1
Slinger	19.0 mi	20.00 pCi/L	1
Plymouth	19.1 mi	6.00 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 Fredonia, WI

What EPA Radon Zone is Fredonia in?

Fredonia and the 53021 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 Fredonia?

No homeowner radon tests have been submitted for Fredonia 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 Fredonia 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 Fredonia?

Radon mitigation in Fredonia 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 Fredonia?

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.