Henry, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Henry in?

Henry is in Marshall County, EPA Zone 1.

Q: How much does radon mitigation cost in Henry?

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

Henry is located in Marshall County along the Illinois River valley, where alluvial soils and underlying limestone bedrock create variable radon conditions throughout the Peoria Metro region. The community features housing from different eras, including older homes with full basements typical of central Illinois. With limited specific radon testing data for the 61537 area, local homeowners should conduct testing to determine their individual property's radon levels.

Henry, IL Radon Mitigation

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

Henry, IL Radon Testing

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

Henry Radon Facts

Key details about the radon risk profile for Henry and the 61537 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Marshall County, IL

Zip Code

61537

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Henry and the 61537 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 Henry, IL

What EPA Radon Zone is Henry in?

Henry and the 61537 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 Henry?

Radon mitigation in Henry 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 Henry?

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