Avalon, WI Radon Mitigation and Testing

Q: What EPA Radon Zone is Avalon in?

Avalon is in Rock County, EPA Zone 1.

Q: How much does radon mitigation cost in Avalon?

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

Rock County

EPA Zone 1

Rural Rock County encompasses Avalon in southern Wisconsin, where glacial deposits over sedimentary bedrock create variable radon conditions throughout the Janesville Metro area. With limited local testing data available, homeowners should conduct professional radon assessments to establish baseline readings for their properties. The area's agricultural character includes older farmsteads and rural residential construction that can experience different radon accumulation rates depending on foundation type and soil characteristics.

Avalon, WI Radon Mitigation

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

Avalon, WI Radon Testing

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

Avalon Radon Facts

Key details about the radon risk profile for Avalon and the 53505 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Rock County, WI

Zip Code

53505

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avalon and the 53505 zip code are located in Rock 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 Avalon, WI

What EPA Radon Zone is Avalon in?

Avalon and the 53505 zip code are in Rock 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 Avalon?

Radon mitigation in Avalon 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 Avalon?

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