Cottage Grove, WI Radon Levels

Q: What EPA Radon Zone is Cottage Grove in?

Cottage Grove is in Dane County, EPA Zone 1.

Q: How much does radon mitigation cost in Cottage Grove?

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

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

Cottage Grove, WI Radon Facts

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

County Dane County, WI

Zip Code 53527

Located in Dane County within the Madison Metro area, Cottage Grove sits on Wisconsin's glacial landscape where till deposits over dolomite bedrock can facilitate radon migration. Testing data for the 53527 zip code area remains limited, highlighting the importance of professional radon assessment for homeowners. The area's typical full-basement construction provides enclosed spaces where radon can accumulate to concerning levels.

9.75

pCi/L area average

Above EPA Action Level

Dane County average: 9.75 pCi/L, based on 8 user-submitted tests across 7 cities in the county. No homeowner readings have been submitted for Cottage Grove 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+

Cottage Grove, 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 Cottage Grove, WI

No homeowner tests have been submitted for Cottage Grove 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
Mc Farland	6.6 mi	9.00 pCi/L	1
Oregon	13.9 mi	12.00 pCi/L	1
Waunakee	14.6 mi	5.50 pCi/L	2
Middleton	15.5 mi	4.00 pCi/L	1
Verona	18.5 mi	18.00 pCi/L	1
Arlington	19.0 mi	6.00 pCi/L	1
Fall River	23.4 mi	10.00 pCi/L	1
Milton	24.2 mi	11.50 pCi/L	2

Dane County Radon Profile

Dane 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 7 cities in Dane County average 9.75 pCi/L across 8 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 Dane County to test, as levels can differ between neighboring homes.

Radon FAQ for Cottage Grove, WI

What EPA Radon Zone is Cottage Grove in?

Cottage Grove and the 53527 zip code are in Dane 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 Cottage Grove?

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

Radon mitigation in Cottage Grove 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 Cottage Grove?

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.