Claremont, IL Radon Mitigation and Testing

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.

Richland County

EPA Zone 2

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.

Claremont, IL Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Claremont, IL Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Claremont Radon Facts

Key details about the radon risk profile for Claremont and the 62421 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Richland County, IL

Zip Code

62421

Predicted Screening Level

2–4 pCi/L (Zone 2)

Claremont and the 62421 zip code are located in Richland County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

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.

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.

Most Active Radon Markets in Illinois

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Buffalo Grove	6.10 pCi/L	10
Crystal Lake	7.25 pCi/L	8
Lake Zurich	6.00 pCi/L	7
Grayslake	5.00 pCi/L	7
New Lenox	10.17 pCi/L	6
Park Ridge	7.00 pCi/L	6
Arlington Heights	6.17 pCi/L	6
Waterloo	9.20 pCi/L	5
Palatine	7.80 pCi/L	5
Round Lake	7.80 pCi/L	5
Northbrook	6.20 pCi/L	5
Mchenry	11.00 pCi/L	4
Dekalb	8.75 pCi/L	4
Columbia	8.00 pCi/L	4
Lisle	7.25 pCi/L	4
Normal	7.25 pCi/L	4
Antioch	7.00 pCi/L	4
Elk Grove Village	7.00 pCi/L	4
Aurora	6.75 pCi/L	4
Hoffman Estates	6.75 pCi/L	4