Beloit, WI Radon Mitigation and Testing

Q: What EPA Radon Zone is Beloit in?

Beloit is in Rock County, EPA Zone 1.

Q: How much does radon mitigation cost in Beloit?

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

Positioned in Rock County within the Janesville Metro area, Beloit sits near the Illinois border atop dolomite bedrock that contributes to Wisconsin's elevated radon potential. The city's diverse housing stock spans from historic 19th-century homes to modern suburban developments, many with full basements that can accumulate radon gas from underlying carbonate rocks. Given the EPA Zone 1 designation and limited testing data for zip code 53511, all residents should consider professional radon testing regardless of home age.

Beloit, WI Radon Mitigation

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

Beloit, WI Radon Testing

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

Beloit Radon Facts

Key details about the radon risk profile for Beloit and the 53511 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Rock County, WI

Zip Code

53511

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Beloit and the 53511 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 Beloit, WI

What EPA Radon Zone is Beloit in?

Beloit and the 53511 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 Beloit?

Radon mitigation in Beloit 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 Beloit?

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