Goreville, IL Radon Levels

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.

Check local Goreville radon levels and find certified testing and mitigation professionals to keep your home safe

Goreville, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Johnson County, IL

Zip Code 62939

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.

5.33

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 5.33 pCi/L, based on 3 tests from 3 nearby cities. No readings have been submitted for Goreville yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Goreville, IL Radon Mitigation

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

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Radon Readings Near Goreville, IL

No homeowner tests have been submitted for Goreville yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Marion	10.6 mi	5.00 pCi/L	1
Murphysboro	24.0 mi	10.00 pCi/L	1
Campbell Hill	41.3 mi	1.00 pCi/L	1

Johnson County Radon Profile

Johnson County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. User-submitted readings are still sparse within Johnson County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Johnson County.

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.

Why are radon readings shown from areas near Goreville?

No homeowner radon tests have been submitted for Goreville yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Johnson County average—are the best available indicator of local conditions until Goreville homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

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.