North Henderson, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is North Henderson in?

North Henderson is in Mercer County, EPA Zone 1.

Q: How much does radon mitigation cost in North Henderson?

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

Mercer County

EPA Zone 1

Situated in Mercer County within the Davenport metropolitan area, North Henderson lies in Illinois River valley terrain where alluvial soils over limestone create variable radon potential. Limited testing data exists for this zip code 61466 community, making individual home assessment crucial. Homeowners in this western Illinois location should prioritize radon testing given the region's underlying geology and typical basement construction.

North Henderson, IL Radon Mitigation

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

North Henderson, IL Radon Testing

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

North Henderson Radon Facts

Key details about the radon risk profile for North Henderson and the 61466 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Mercer County, IL

Zip Code

61466

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

North Henderson and the 61466 zip code are located in Mercer 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 North Henderson, IL

What EPA Radon Zone is North Henderson in?

North Henderson and the 61466 zip code are in Mercer 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 North Henderson?

Radon mitigation in North Henderson 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 North Henderson?

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