Sullivan, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Sullivan in?

Sullivan is in Moultrie County, EPA Zone 1.

Q: How much does radon mitigation cost in Sullivan?

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

Moultrie County

EPA Zone 1

Sullivan in Moultrie County sits in EPA Zone 1 within central Illinois, where deep glacial moraine deposits over limestone bedrock contribute to moderate-to-high radon potential across the central Illinois prairie. The small town features predominantly older homes with full basements, creating the enclosed below-grade spaces where radon accumulates most readily. Given limited testing data for zip code 61951, homeowners should prioritize radon testing to understand their individual exposure risk.

Sullivan, IL Radon Mitigation

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

Sullivan, IL Radon Testing

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

Sullivan Radon Facts

Key details about the radon risk profile for Sullivan and the 61951 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Moultrie County, IL

Zip Code

61951

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Sullivan and the 61951 zip code are located in Moultrie 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 Sullivan, IL

What EPA Radon Zone is Sullivan in?

Sullivan and the 61951 zip code are in Moultrie 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 Sullivan?

Radon mitigation in Sullivan 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 Sullivan?

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