Saint Jacob, IL Radon Levels

Q: What EPA Radon Zone is Saint Jacob in?

Saint Jacob is in Madison County, EPA Zone 2.

Q: How much does radon mitigation cost in Saint Jacob?

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

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

Saint Jacob, IL Radon Facts

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

County Madison County, IL

Zip Code 62281

Based in Madison County on the Illinois side of the St. Louis Metro area, Saint Jacob currently lacks sufficient radon testing data for the 62281 zip code. Mississippi River floodplain deposits and underlying Mississippian limestone create moderate radon potential, though individual homes near bluffs can see significantly elevated readings. The community's mix of mid-century homes and newer suburban developments, with basements less common than in northern Illinois, still requires targeted radon testing for accurate risk assessment.

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 Saint Jacob 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+

Saint Jacob, 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 Saint Jacob, IL

No homeowner tests have been submitted for Saint Jacob 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
Troy	4.4 mi	4.00 pCi/L	1
Lebanon	7.0 mi	10.50 pCi/L	2
Highland	7.3 mi	6.00 pCi/L	1
Maryville	9.4 mi	11.00 pCi/L	1
Glen Carbon	10.3 mi	2.50 pCi/L	2
Collinsville	10.5 mi	5.00 pCi/L	1
O Fallon	10.8 mi	6.00 pCi/L	1
Caseyville	12.9 mi	7.50 pCi/L	2

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 Saint Jacob, IL

What EPA Radon Zone is Saint Jacob in?

Saint Jacob and the 62281 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 Saint Jacob?

No homeowner radon tests have been submitted for Saint Jacob 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 Saint Jacob 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 Saint Jacob?

Radon mitigation in Saint Jacob 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 Saint Jacob?

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.