Dorsey, IL Radon Levels

Q: What EPA Radon Zone is Dorsey in?

Dorsey is in Madison County, EPA Zone 2.

Q: Why are radon readings shown from areas near Dorsey?

No homeowner radon tests have been submitted for Dorsey yet, so readings from the closest cities and the Madison County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Dorsey?

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

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

Dorsey, IL Radon Facts

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

County Madison County, IL

Zip Code 62021

Situated in Madison County on the Illinois side of the St. Louis metropolitan area, Dorsey lies within Mississippi River floodplain deposits and underlying Mississippian limestone that create moderate radon potential. Testing data for this community is currently limited, making individual home assessment essential for ZIP code 62021 residents. Homeowners should conduct radon testing to determine their specific exposure levels given the area's geological characteristics.

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 Dorsey 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+

Dorsey, 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 Dorsey, IL

No homeowner tests have been submitted for Dorsey 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
East Alton	9.1 mi	4.00 pCi/L	1
Staunton	10.6 mi	8.00 pCi/L	1
Godfrey	12.5 mi	6.00 pCi/L	1
Glen Carbon	15.4 mi	2.50 pCi/L	2
Maryville	18.6 mi	11.00 pCi/L	1
Troy	18.8 mi	4.00 pCi/L	1
Granite City	19.1 mi	8.00 pCi/L	1
Collinsville	20.7 mi	5.00 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 Dorsey, IL

What EPA Radon Zone is Dorsey in?

Dorsey and the 62021 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 Dorsey?

No homeowner radon tests have been submitted for Dorsey 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 Dorsey 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 Dorsey?

Radon mitigation in Dorsey 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 Dorsey?

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.