Thornton, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Thornton in?

Thornton is in Cook County, EPA Zone 2.

Q: How much does radon mitigation cost in Thornton?

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

Cook County

EPA Zone 2

Positioned in Cook County within the southern reaches of the Chicago metro area, Thornton sits over glacial till deposits that create favorable conditions for radon production and migration. The village's housing stock includes both older homes from the early 1900s and postwar developments, most featuring full basements standard throughout northern Illinois. With testing data currently limited for zip code 60476, residents should prioritize professional radon testing given the region's geological radon potential.

Thornton, IL Radon Mitigation

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

Thornton, IL Radon Testing

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

Thornton Radon Facts

Key details about the radon risk profile for Thornton and the 60476 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cook County, IL

Zip Code

60476

Predicted Screening Level

2–4 pCi/L (Zone 2)

Thornton and the 60476 zip code are located in Cook 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 Thornton, IL

What EPA Radon Zone is Thornton in?

Thornton and the 60476 zip code are in Cook 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 Thornton?

Radon mitigation in Thornton 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 Thornton?

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