Louisville, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Louisville in?

Louisville is in Clay County, EPA Zone 2.

Q: How much does radon mitigation cost in Louisville?

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

Clay County

EPA Zone 2

Positioned in Clay County in south-central Illinois, Louisville sits on Pennsylvanian-era coal measures that can produce moderate radon levels. Testing data for this rural community remains limited, making professional radon testing particularly important for homeowners. The area's older farmhouses and newer rural residences in zip code 62858 may show varying radon entry patterns based on foundation types.

Louisville, IL Radon Mitigation

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

Louisville, IL Radon Testing

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

Louisville Radon Facts

Key details about the radon risk profile for Louisville and the 62858 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Clay County, IL

Zip Code

62858

Predicted Screening Level

2–4 pCi/L (Zone 2)

Louisville and the 62858 zip code are located in Clay 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 Louisville, IL

What EPA Radon Zone is Louisville in?

Louisville and the 62858 zip code are in Clay 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 Louisville?

Radon mitigation in Louisville 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 Louisville?

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