Onalaska, WI Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is Onalaska in?

Onalaska is in La Crosse County, EPA Zone 2.

Q: How much does radon mitigation cost in Onalaska?

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

Avg: 3.00 pCi/L

La Crosse County

EPA Zone 2

1 user test

This La Crosse County community in zip code 54650 recorded an average radon level of 3.0 pCi/L based on limited testing data, placing it within EPA recommended ranges but still warranting attention. Located along the Mississippi River valley where glacial deposits over sedimentary bedrock create the EPA Zone 2 classification, Onalaska reflects moderate radon potential typical of western Wisconsin. Additional testing by more homeowners would help establish clearer patterns for this area.

3.00

pCi/L average

Below EPA Action Level

Based on 1 user-submitted radon test for homes in Onalaska, WI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Onalaska, WI Radon Mitigation

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

Onalaska, WI Radon Testing

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

Onalaska, Wisconsin Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Onalaska, WI	21-50 Years	Partial Basement	Jan 2022

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

Onalaska Radon Facts

Key details about the radon risk profile for Onalaska and the 54650 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

La Crosse County, WI

Zip Code

54650

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

3.00 pCi/L

User Tests Submitted

Onalaska and the 54650 zip code are located in La Crosse County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Onalaska, WI

What is the average radon level in Onalaska, WI?

Based on 1 user-submitted test, the average radon level in Onalaska is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Onalaska in?

Onalaska and the 54650 zip code are in La Crosse County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Onalaska?

Radon mitigation in Onalaska 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 Onalaska?

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