Wenona, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Wenona in?

Wenona is in Marshall County, EPA Zone 1.

Q: How much does radon mitigation cost in Wenona?

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

Marshall County

EPA Zone 1

Small Wenona sits in Marshall County along the Illinois River valley, where alluvial soils over Ordovician limestone create variable radon conditions that can differ significantly between neighboring properties. Testing data for zip code 61377 is currently unavailable, but the geological setting suggests homeowners should conduct assessments. River valley communities often experience unpredictable radon patterns.

Wenona, IL Radon Mitigation

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

Wenona, IL Radon Testing

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

Wenona Radon Facts

Key details about the radon risk profile for Wenona and the 61377 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Marshall County, IL

Zip Code

61377

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Wenona and the 61377 zip code are located in Marshall 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 Wenona, IL

What EPA Radon Zone is Wenona in?

Wenona and the 61377 zip code are in Marshall 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 Wenona?

Radon mitigation in Wenona 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 Wenona?

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 Illinois

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

City	Avg User Radon Level	Submissions
Buffalo Grove	6.10 pCi/L	10
Crystal Lake	7.25 pCi/L	8
Lake Zurich	6.00 pCi/L	7
Grayslake	5.00 pCi/L	7
New Lenox	10.17 pCi/L	6
Park Ridge	7.00 pCi/L	6
Arlington Heights	6.17 pCi/L	6
Waterloo	9.20 pCi/L	5
Palatine	7.80 pCi/L	5
Round Lake	7.80 pCi/L	5
Northbrook	6.20 pCi/L	5
Mchenry	11.00 pCi/L	4
Dekalb	8.75 pCi/L	4
Columbia	8.00 pCi/L	4
Lisle	7.25 pCi/L	4
Normal	7.25 pCi/L	4
Antioch	7.00 pCi/L	4
Elk Grove Village	7.00 pCi/L	4
Aurora	6.75 pCi/L	4
Hoffman Estates	6.75 pCi/L	4