Rockford, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Rockford in?

Rockford is in Winnebago County, EPA Zone 1.

Q: How much does radon mitigation cost in Rockford?

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

Winnebago County

EPA Zone 1

As Winnebago County's largest city in the northwest suburban and exurban belt beyond the Chicago metro, Rockford sits on glacial till deposits from the Wisconsin glaciation that create soil conditions highly favorable for radon gas production. The city's diverse housing stock spans from early 1900s construction to modern subdivisions, with full basements standard throughout zip codes 61101-61114. Given the limited current testing data and the region's geological profile, homeowners should prioritize radon testing to establish safe indoor air quality.

Rockford, IL Radon Mitigation

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

Rockford, IL Radon Testing

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

Rockford Radon Facts

Key details about the radon risk profile for Rockford and the 61101 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Winnebago County, IL

Zip Code

61101

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Rockford and the 61101 zip code are located in Winnebago 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 Rockford, IL

What EPA Radon Zone is Rockford in?

Rockford and the 61101 zip code are in Winnebago 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 Rockford?

Radon mitigation in Rockford 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 Rockford?

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