Claremont, IL Radon Levels

Q: What EPA Radon Zone is Claremont in?

Claremont is in Richland County, EPA Zone 2.

Q: How much does radon mitigation cost in Claremont?

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

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

Claremont, IL Radon Facts

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

County Richland County, IL

Zip Code 62421

Rural Richland County hosts Claremont amid southeastern Illinois's coal-bearing geological formations that can contribute to variable radon levels across the region. Current testing data for zip code 62421 is limited, making individual property assessment important for residents. The area's mix of older farmhouses and newer rural homes may exhibit different radon characteristics depending on foundation types and local soil conditions.

8.12

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 8.12 pCi/L, based on 8 tests from 4 nearby cities. No readings have been submitted for Claremont yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Claremont, 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 Claremont, IL

No homeowner tests have been submitted for Claremont 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
Bridgeport	11.4 mi	5.00 pCi/L	1
Mount Carmel	24.7 mi	5.00 pCi/L	2
Palestine	26.3 mi	18.50 pCi/L	2
Effingham	41.1 mi	4.33 pCi/L	3

Richland County Radon Profile

Richland County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. User-submitted readings are still sparse within Richland County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Richland County.

Radon FAQ for Claremont, IL

What EPA Radon Zone is Claremont in?

Claremont and the 62421 zip code are in Richland 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 Claremont?

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

Radon mitigation in Claremont 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 Claremont?

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.