Custer, WI Radon Mitigation and Testing

Q: What EPA Radon Zone is Custer in?

Custer is in Portage County, EPA Zone 1.

Q: How much does radon mitigation cost in Custer?

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

Portage County

EPA Zone 1

Positioned in Portage County in central Wisconsin, Custer sits on glacial outwash deposits over crystalline bedrock that can produce elevated radon levels. Testing data for this 54423 community remains unavailable, making professional radon testing crucial for area residents. The region's sandy soils over granite and gneiss bedrock suggest significant potential for radon accumulation.

Custer, WI Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Custer, WI Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Custer Radon Facts

Key details about the radon risk profile for Custer and the 54423 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Portage County, WI

Zip Code

54423

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Custer and the 54423 zip code are located in Portage County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Custer, WI

What EPA Radon Zone is Custer in?

Custer and the 54423 zip code are in Portage 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.

How much does radon mitigation cost in Custer?

Radon mitigation in Custer 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 Custer?

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.

Most Active Radon Markets in Wisconsin

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Milwaukee	10.00 pCi/L	3
Prairie Du Chien	10.00 pCi/L	2
Stevens Point	5.50 pCi/L	2
Menomonie	10.00 pCi/L	1
Delavan	6.00 pCi/L	1
Shawano	No submissions	0
Sturgeon Bay	No submissions	0