Lenzburg, IL Radon Levels

Q: What EPA Radon Zone is Lenzburg in?

Lenzburg is in St Clair County, EPA Zone 2.

Q: How much does radon mitigation cost in Lenzburg?

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

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

Lenzburg, IL Radon Facts

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

County St Clair County, IL

Zip Code 62255

Part of the St. Louis Metro area, Lenzburg in St. Clair County sits on Mississippi River floodplain deposits over limestone bedrock that can create variable radon conditions. Testing data for zip code 62255 is currently limited, making individual home testing essential for residents. The area's mix of slab-on-grade and crawl space homes, combined with underlying limestone geology, creates conditions where radon testing should be a homeowner priority.

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 Lenzburg 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+

Lenzburg, 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 Lenzburg, IL

No homeowner tests have been submitted for Lenzburg yet, so the closest user-submitted readings from neighboring communities are shown below. Radon varies by home — testing is the only way to know your level.

Radon Level	City	Distance	Home Age	Foundation	Submitted
4 pCi/L	Marissa, IL	4.1 mi	21-50 Years	Full Basement	May 2023
5 pCi/L	Mascoutah, IL	12.4 mi	0-20 Years	Full Basement	Apr 2024
8 pCi/L	Mascoutah, IL	12.4 mi	0-20 Years	Full Basement	Apr 2017
9 pCi/L	Waterloo, IL	19.4 mi	—	—	Mar 2026
14 pCi/L	Waterloo, IL	19.4 mi	21-50 Years	Partial Basement	May 2022
7 pCi/L	Waterloo, IL	19.4 mi	—	—	Feb 2021
8 pCi/L	Belleville, IL	19.8 mi	51-99 Years	Full Basement	Oct 2021
6 pCi/L	Belleville, IL	19.8 mi	51-99 Years	Full Basement	Sep 2020

Readings are drawn from the nearest cities with submitted data. Have a result for Lenzburg? Submit your reading to help your neighbors.

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 Lenzburg, IL

What EPA Radon Zone is Lenzburg in?

Lenzburg and the 62255 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 Lenzburg?

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

Radon mitigation in Lenzburg 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 Lenzburg?

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.

Radon Levels Near Lenzburg, IL

User-submitted radon levels from the cities closest to Lenzburg with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Marissa	4.1 mi	4.00 pCi/L	1
Mascoutah	12.4 mi	6.50 pCi/L	2
Waterloo	19.4 mi	9.20 pCi/L	5
Belleville	19.8 mi	7.33 pCi/L	3
O Fallon	19.9 mi	6.00 pCi/L	1
Lebanon	21.4 mi	10.50 pCi/L	2
Fairview Heights	23.8 mi	9.00 pCi/L	1
Columbia	24.2 mi	8.00 pCi/L	4