Chatham, IL Radon Mitigation and Testing

Q: What is the average radon level in Chatham, IL?

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is Chatham in?

Chatham is in Sangamon County, EPA Zone 1.

Q: How much does radon mitigation cost in Chatham?

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

Avg: 3.00 pCi/L

Sangamon County

EPA Zone 1

1 user test

Chatham is located in Sangamon County, Illinois. With 1 user-submitted readings averaging 3.00 pCi/L, levels are currently below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

3.00

pCi/L average

Below EPA Action Level

Based on 1 user-submitted radon test for homes in Chatham, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Chatham, IL Radon Mitigation

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

Chatham, IL Radon Testing

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

Chatham, Illinois Radon Levels

User-submitted radon test readings from homes in the Chatham area.

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Chatham, IL	0-20 Years	Full Basement	Jan 2025

Have a radon test result for Chatham? Submit your reading to help other homeowners.

Chatham Radon Facts

Key details about the radon risk profile for Chatham and the 62629 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Sangamon County, IL

Zip Code

62629

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

3.00 pCi/L

User Tests Submitted

Chatham and the 62629 zip code are located in Sangamon 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 Chatham, IL

What is the average radon level in Chatham, IL?

Based on 1 user-submitted test, the average radon level in Chatham is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Chatham in?

Chatham and the 62629 zip code are in Sangamon 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 Chatham?

Radon mitigation in Chatham 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 Chatham?

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