Saint Joseph, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Saint Joseph in?

Saint Joseph is in Champaign County, EPA Zone 1.

Q: How much does radon mitigation cost in Saint Joseph?

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

Champaign County

EPA Zone 1

Situated in Champaign County within the central Illinois prairie region, Saint Joseph benefits from deep glacial moraine deposits over limestone bedrock that contribute to moderate-to-high radon potential. The area features a mix of historic homes and postwar ranch-style construction, many with full or partial basements. Testing data remains limited for this zip code 61873, making professional radon testing essential for local homeowners.

Saint Joseph, IL Radon Mitigation

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

Saint Joseph, IL Radon Testing

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

Saint Joseph Radon Facts

Key details about the radon risk profile for Saint Joseph and the 61873 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Champaign County, IL

Zip Code

61873

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Saint Joseph and the 61873 zip code are located in Champaign County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Saint Joseph, IL

What EPA Radon Zone is Saint Joseph in?

Saint Joseph and the 61873 zip code are in Champaign County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Saint Joseph?

Radon mitigation in Saint Joseph 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 Saint Joseph?

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