Cobb, WI Radon Levels

Q: What EPA Radon Zone is Cobb in?

Cobb is in Iowa County, EPA Zone 1.

Q: Why are radon readings shown from areas near Cobb?

No homeowner radon tests have been submitted for Cobb yet, so readings from the closest cities and the Iowa County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Cobb?

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

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

Cobb, WI Radon Facts

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

County Iowa County, WI

Zip Code 53526

Part of the Madison Metro area in southwestern Wisconsin, Iowa County's Cobb community sits on Paleozoic limestone and dolomite bedrock known for producing significant radon levels. While specific testing data for zip code 53526 isn't available, the area's EPA Zone 1 status reflects high radon potential common throughout the region. Residents should prioritize radon testing, especially in homes with basements typical of Wisconsin construction.

8.00

pCi/L area average

Above EPA Action Level

Iowa County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Cobb 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+

Cobb, 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 Cobb, WI

No homeowner tests have been submitted for Cobb 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
Ridgeway	17.6 mi	8.00 pCi/L	1
Spring Green	20.4 mi	4.00 pCi/L	1
Blue River	22.7 mi	6.00 pCi/L	1
Blue Mounds	25.3 mi	15.00 pCi/L	1
Potosi	26.7 mi	17.00 pCi/L	1
Mount Horeb	30.0 mi	9.00 pCi/L	1
New Glarus	36.4 mi	7.00 pCi/L	1
Verona	39.5 mi	18.00 pCi/L	1

Iowa County Radon Profile

The bedrock and soils beneath Iowa 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 Iowa County average 8.00 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 Iowa County.

Radon FAQ for Cobb, WI

What EPA Radon Zone is Cobb in?

Cobb and the 53526 zip code are in Iowa 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 Cobb?

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

Radon mitigation in Cobb 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 Cobb?

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.