Dupo, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Dupo in?

Dupo is in St Clair County, EPA Zone 2.

Q: How much does radon mitigation cost in Dupo?

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

St Clair County

EPA Zone 2

Situated in St. Clair County along the Mississippi River floodplain, Dupo occupies terrain where alluvial deposits over limestone bedrock can create moderate radon conditions that vary significantly from neighborhood to neighborhood. Testing data for zip code 62239 remains limited, encouraging St. Louis Metro residents to assess their homes through professional radon testing. The area's mix of older homes with basements and newer slab construction can experience different radon accumulation patterns.

Dupo, IL Radon Mitigation

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

Dupo, IL Radon Testing

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

Dupo Radon Facts

Key details about the radon risk profile for Dupo and the 62239 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

St Clair County, IL

Zip Code

62239

Predicted Screening Level

2–4 pCi/L (Zone 2)

Dupo and the 62239 zip code are located in St Clair 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 Dupo, IL

What EPA Radon Zone is Dupo in?

Dupo and the 62239 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.

How much does radon mitigation cost in Dupo?

Radon mitigation in Dupo 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 Dupo?

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