Goreville, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Goreville in?

Goreville is in Johnson County, EPA Zone 2.

Q: How much does radon mitigation cost in Goreville?

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

Johnson County

EPA Zone 2

Located in Johnson County in southern Illinois near the Shawnee National Forest region, Goreville sits where Pennsylvanian-era shale and sandstone formations create generally moderate radon conditions. Testing data remains limited for this 62939 zip code area, making professional radon testing worthwhile for homeowners. The region's geology differs significantly from northern Illinois, with individual readings varying based on local rock formations and soil conditions.

Goreville, IL Radon Mitigation

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

Goreville, IL Radon Testing

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

Goreville Radon Facts

Key details about the radon risk profile for Goreville and the 62939 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Johnson County, IL

Zip Code

62939

Predicted Screening Level

2–4 pCi/L (Zone 2)

Goreville and the 62939 zip code are located in Johnson 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 Goreville, IL

What EPA Radon Zone is Goreville in?

Goreville and the 62939 zip code are in Johnson 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 Goreville?

Radon mitigation in Goreville 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 Goreville?

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