Centralia, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is Centralia in?

Centralia is in Marion County, EPA Zone 2.

Q: How much does radon mitigation cost in Centralia?

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

Marion County

EPA Zone 2

Positioned in Marion County within the St. Louis Metro area, Centralia sits in EPA Zone 2 where moderate radon levels are typical. The region's coal-bearing geology and Pennsylvanian-era rock formations create variable subsurface conditions that can affect radon migration patterns. With limited testing data available for zip code 62801, homeowners should consider professional radon assessment to understand their specific risk.

Centralia, IL Radon Mitigation

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

Centralia, IL Radon Testing

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

Centralia Radon Facts

Key details about the radon risk profile for Centralia and the 62801 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Marion County, IL

Zip Code

62801

Predicted Screening Level

2–4 pCi/L (Zone 2)

Centralia and the 62801 zip code are located in Marion 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 Centralia, IL

What EPA Radon Zone is Centralia in?

Centralia and the 62801 zip code are in Marion 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 Centralia?

Radon mitigation in Centralia 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 Centralia?

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