Delafield, WI Radon Levels

Q: What EPA Radon Zone is Delafield in?

Delafield is in Waukesha County, EPA Zone 1.

Q: How much does radon mitigation cost in Delafield?

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

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

Delafield, WI Radon Facts

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

County Waukesha County, WI

Zip Code 53018

This lakeside community in Waukesha County sits within Wisconsin's glaciated terrain where uranium-bearing bedrock can produce significant radon levels. Testing data for zip code 53018 in the Milwaukee Metro area remains limited despite the region's known radon potential. Delafield's mix of historic lakefront homes and modern subdivisions, most with full basements, requires careful radon evaluation.

6.80

pCi/L area average

Above EPA Action Level

Waukesha County average: 6.80 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Delafield 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+

Delafield, 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 Delafield, WI

No homeowner tests have been submitted for Delafield 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
Pewaukee	6.6 mi	10.00 pCi/L	1
Waukesha	8.1 mi	5.50 pCi/L	2
Menomonee Falls	16.2 mi	6.50 pCi/L	2
Slinger	20.3 mi	20.00 pCi/L	1
Watertown	20.6 mi	7.00 pCi/L	1
Milwaukee	21.7 mi	10.00 pCi/L	3
Franklin	22.2 mi	6.00 pCi/L	1
Waterford	22.2 mi	9.00 pCi/L	2

Waukesha County Radon Profile

Waukesha County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Waukesha County average 6.80 pCi/L across 5 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 Waukesha County to test, as levels can differ between neighboring homes.

Radon FAQ for Delafield, WI

What EPA Radon Zone is Delafield in?

Delafield and the 53018 zip code are in Waukesha 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 Delafield?

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

Radon mitigation in Delafield 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 Delafield?

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.