Edwardsville, IL Radon Levels

Q: What EPA Radon Zone is Edwardsville in?

Edwardsville is in Madison County, EPA Zone 2.

Q: How much does radon mitigation cost in Edwardsville?

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

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

Edwardsville, IL Radon Facts

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

County Madison County, IL

Zip Code 62025

Positioned in Madison County on the Illinois side of the St. Louis Metro area, Edwardsville sits on Mississippi River bluff formations where loess deposits over limestone create variable radon conditions. The community features a diverse housing stock from historic properties to modern suburban developments, with basement construction common throughout zip code 62025. While specific testing data is limited, homeowners should consider radon testing as levels can vary significantly based on individual soil conditions and home construction factors.

5.44

pCi/L area average

Above EPA Action Level

Madison County average: 5.44 pCi/L, based on 9 user-submitted tests across 8 cities in the county. No homeowner readings have been submitted for Edwardsville itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Edwardsville, 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 Edwardsville, IL

No homeowner tests have been submitted for Edwardsville 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
Glen Carbon	3.1 mi	2.50 pCi/L	2
Maryville	6.3 mi	11.00 pCi/L	1
Troy	7.5 mi	4.00 pCi/L	1
East Alton	8.3 mi	4.00 pCi/L	1
Collinsville	8.5 mi	5.00 pCi/L	1
Granite City	9.6 mi	8.00 pCi/L	1
Caseyville	12.1 mi	7.50 pCi/L	2
Fairview Heights	14.6 mi	9.00 pCi/L	1

Madison County Radon Profile

The soils and bedrock of Madison County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 8 cities in Madison County average 5.44 pCi/L across 9 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Madison County to test, as levels can differ between neighboring homes.

Radon FAQ for Edwardsville, IL

What EPA Radon Zone is Edwardsville in?

Edwardsville and the 62025 zip code are in Madison 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 Edwardsville?

No homeowner radon tests have been submitted for Edwardsville yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Madison County average—are the best available indicator of local conditions until Edwardsville 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 Edwardsville?

Radon mitigation in Edwardsville 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 Edwardsville?

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.