Rock City, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Rock City in?

Rock City is in Stephenson County, EPA Zone 1.

Q: How much does radon mitigation cost in Rock City?

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

Stephenson County

EPA Zone 1

Rock City in Stephenson County sits within northwestern Illinois' glacial till region, positioned in EPA Zone 1 where Wisconsin glaciation deposits over limestone bedrock create high radon potential. The 61070 area features rural residential properties with housing typical of northern Illinois agricultural communities, many with full basement foundations common to the region. Testing data is currently limited, making radon testing essential for homeowners given the area's elevated geological risk factors.

Rock City, IL Radon Mitigation

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

Rock City, IL Radon Testing

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

Rock City Radon Facts

Key details about the radon risk profile for Rock City and the 61070 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stephenson County, IL

Zip Code

61070

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Rock City and the 61070 zip code are located in Stephenson 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 Rock City, IL

What EPA Radon Zone is Rock City in?

Rock City and the 61070 zip code are in Stephenson 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 Rock City?

Radon mitigation in Rock City 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 Rock City?

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