Freeburg, IL Radon Levels

Q: What EPA Radon Zone is Freeburg in?

Freeburg is in St Clair County, EPA Zone 2.

Q: How much does radon mitigation cost in Freeburg?

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

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

Freeburg, IL Radon Facts

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

County St Clair County, IL

Zip Code 62243

Positioned in St. Clair County on the Illinois side of the St. Louis Metro area, Freeburg currently has limited radon testing data available. Mississippi River floodplain deposits and underlying Mississippian limestone create moderate radon potential, though individual homes near bluffs can see significantly elevated readings. Given the area's geological characteristics, homeowners in zip code 62243 should prioritize radon testing regardless of home age.

7.50

pCi/L area average

Above EPA Action Level

St Clair County average: 7.50 pCi/L, based on 12 user-submitted tests across 7 cities in the county. No homeowner readings have been submitted for Freeburg 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+

Freeburg, 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 Freeburg, IL

No homeowner tests have been submitted for Freeburg 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
Mascoutah	8.4 mi	6.50 pCi/L	2
Belleville	9.6 mi	7.33 pCi/L	3
O Fallon	11.4 mi	6.00 pCi/L	1
Waterloo	13.8 mi	9.20 pCi/L	5
Fairview Heights	13.9 mi	9.00 pCi/L	1
Marissa	14.5 mi	4.00 pCi/L	1
Lebanon	15.1 mi	10.50 pCi/L	2
Columbia	15.5 mi	8.00 pCi/L	4

St Clair County Radon Profile

EPA mapping assigns St Clair County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 7 cities in St Clair County average 7.50 pCi/L across 12 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every St Clair County home regardless of zone or a neighbor's results.

Radon FAQ for Freeburg, IL

What EPA Radon Zone is Freeburg in?

Freeburg and the 62243 zip code are in St Clair 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 Freeburg?

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

Radon mitigation in Freeburg 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 Freeburg?

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.