Lake Mills, WI Radon Levels

Q: What EPA Radon Zone is Lake Mills in?

Lake Mills is in Jefferson County, EPA Zone 1.

Q: How much does radon mitigation cost in Lake Mills?

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

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

Lake Mills, WI Radon Facts

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

County Jefferson County, WI

Zip Code 53551

Positioned in Jefferson County in southeastern Wisconsin, Lake Mills sits within EPA Zone 1, indicating high radon potential from the area's glacial deposits and underlying bedrock formations. Testing data for zip code 53551 remains limited, making professional radon testing a priority for local homeowners. The community's combination of historic homes dating to the late 1800s and modern suburban development creates varying foundation types that may influence radon entry patterns.

7.00

pCi/L area average

Above EPA Action Level

Jefferson County average: 7.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Lake Mills 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+

Lake Mills, 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 Lake Mills, WI

No homeowner tests have been submitted for Lake Mills 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
Watertown	14.5 mi	7.00 pCi/L	1
Mc Farland	19.9 mi	9.00 pCi/L	1
Milton	21.0 mi	11.50 pCi/L	2
Fall River	23.3 mi	10.00 pCi/L	1
Juneau	23.6 mi	4.00 pCi/L	1
Oregon	26.1 mi	12.00 pCi/L	1
Beaver Dam	26.5 mi	10.00 pCi/L	1
Waunakee	28.1 mi	5.50 pCi/L	2

Jefferson County Radon Profile

The bedrock and soils beneath Jefferson 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 1 city in Jefferson County average 7.00 pCi/L across 1 test — 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 Jefferson County.

Radon FAQ for Lake Mills, WI

What EPA Radon Zone is Lake Mills in?

Lake Mills and the 53551 zip code are in Jefferson 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 Lake Mills?

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

Radon mitigation in Lake Mills 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 Lake Mills?

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.