Waterloo, WI Radon Levels

Q: What EPA Radon Zone is Waterloo in?

Waterloo is in Jefferson County, EPA Zone 1.

Q: How much does radon mitigation cost in Waterloo?

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

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

Waterloo, WI Radon Facts

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

County Jefferson County, WI

Zip Code 53594

Positioned in Jefferson County within the Madison Metro area, Waterloo currently has limited radon testing submissions available. Wisconsin's glacial geology and the prevalence of basement foundations throughout this region create conditions where radon testing is essential, as neighboring communities have recorded elevated levels.

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 Waterloo 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+

Waterloo, 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 Waterloo, WI

No homeowner tests have been submitted for Waterloo 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	13.9 mi	7.00 pCi/L	1
Fall River	15.5 mi	10.00 pCi/L	1
Mc Farland	19.7 mi	9.00 pCi/L	1
Juneau	20.2 mi	4.00 pCi/L	1
Beaver Dam	20.5 mi	10.00 pCi/L	1
Arlington	21.5 mi	6.00 pCi/L	1
Waunakee	23.6 mi	5.50 pCi/L	2
Oregon	26.9 mi	12.00 pCi/L	1

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 Waterloo, WI

What EPA Radon Zone is Waterloo in?

Waterloo and the 53594 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 Waterloo?

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

Radon mitigation in Waterloo 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 Waterloo?

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.