East Alton, IL Radon Levels

Q: What is the average radon level in East Alton, IL?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is East Alton in?

East Alton is in Madison County, EPA Zone 2.

Q: How much does radon mitigation cost in East Alton?

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

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

East Alton, IL Radon Facts

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

County Madison County, IL

Zip Code 62024

Avg. User Level 4.00 pCi/L

User Tests 1

Positioned in Madison County on the Illinois side of the St. Louis Metro, East Alton sits over Mississippi River floodplain deposits and underlying limestone that create moderate radon potential throughout the metro east region. Testing data for the 62024 zip code remains limited, making individual home testing valuable for establishing baseline radon levels in this river community.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in East Alton, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

East Alton, 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 East Alton, IL

No homeowner tests have been submitted for East Alton 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
Godfrey	8.0 mi	6.00 pCi/L	1
Glen Carbon	10.2 mi	2.50 pCi/L	2
Granite City	10.8 mi	8.00 pCi/L	1
Maryville	13.1 mi	11.00 pCi/L	1
Collinsville	14.6 mi	5.00 pCi/L	1
Troy	15.7 mi	4.00 pCi/L	1
Caseyville	17.4 mi	7.50 pCi/L	2
Staunton	18.4 mi	8.00 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 East Alton, IL

What is the average radon level in East Alton, IL?

Based on 1 user-submitted test, the average radon level in East Alton is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is East Alton in?

East Alton and the 62024 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.

How much does radon mitigation cost in East Alton?

Radon mitigation in East Alton 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 East Alton?

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.