Fontana, WI Radon Mitigation and Testing

Q: What is the average radon level in Fontana, WI?

Based on 2 user-submitted tests, the average radon level is 4.50 pCi/L.

Q: What EPA Radon Zone is Fontana in?

Fontana is in Walworth County, EPA Zone 1.

Q: How much does radon mitigation cost in Fontana?

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

Avg: 4.50 pCi/L

Walworth County

EPA Zone 1

2 user tests

Positioned in Walworth County near Wisconsin's southern border, Fontana reports an average radon level of 4.5 pCi/L, slightly exceeding the EPA's recommended action threshold. The area's glacial soils over dolomite bedrock, combined with the region's typical basement construction, create conditions where radon can accumulate. Homeowners in zip code 53125 should maintain regular radon monitoring, especially given the community's proximity to Lake Geneva's recreational development.

4.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Fontana, WI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Fontana, WI Radon Mitigation

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

Fontana, WI Radon Testing

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

Fontana, Wisconsin Radon Levels

User-submitted radon test readings from homes in the Fontana area.

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Fontana, WI	51-99 Years	No Basement/All Crawl Space	Oct 2017
4 pCi/L	FONTANA, WI	0-20 Years	Full Basement	Mar 2017

Have a radon test result for Fontana? Submit your reading to help other homeowners.

Fontana Radon Facts

Key details about the radon risk profile for Fontana and the 53125 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Walworth County, WI

Zip Code

53125

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

4.50 pCi/L

User Tests Submitted

Fontana and the 53125 zip code are located in Walworth 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 Fontana, WI

What is the average radon level in Fontana, WI?

Based on 2 user-submitted tests, the average radon level in Fontana is 4.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Fontana in?

Fontana and the 53125 zip code are in Walworth 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 Fontana?

Radon mitigation in Fontana 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 Fontana?

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