Mattoon, IL Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 9.30 pCi/L.

Q: What EPA Radon Zone is Mattoon in?

Mattoon is in Coles County, EPA Zone 1.

Q: How much does radon mitigation cost in Mattoon?

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

Avg: 9.30 pCi/L

Coles County

EPA Zone 1

3 user tests

Mattoon in Coles County shows an average radon level of 9.33 pCi/L, more than double the EPA action threshold, based on recent testing data. Located on deep glacial moraine deposits over limestone bedrock typical of central Illinois, the 61938 zip code area demonstrates the high radon potential common to this prairie region. Homeowners should prioritize immediate testing and consider mitigation systems if elevated levels are confirmed.

9.30

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Mattoon, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Mattoon, IL Radon Mitigation

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

Mattoon, IL Radon Testing

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

Mattoon, Illinois Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
20 pCi/L	Mattoon, IL	100+ Years	Partial Basement	Nov 2020
2 pCi/L	Mattoon, IL	21-50 Years	Full Basement	May 2018
6 pCi/L	Mattoon, IL	51-99 Years	Partial Basement	Oct 2015

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

Mattoon Radon Facts

Key details about the radon risk profile for Mattoon and the 61938 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Coles County, IL

Zip Code

61938

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.30 pCi/L

User Tests Submitted

Mattoon and the 61938 zip code are located in Coles 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 Mattoon, IL

What is the average radon level in Mattoon, IL?

Based on 3 user-submitted tests, the average radon level in Mattoon is 9.30 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Mattoon in?

Mattoon and the 61938 zip code are in Coles 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 Mattoon?

Radon mitigation in Mattoon 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 Mattoon?

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