Peoria, IL Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Peoria in?

Peoria is in Peoria County, EPA Zone 1.

Q: How much does radon mitigation cost in Peoria?

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

Avg: 5.00 pCi/L

Peoria County

EPA Zone 1

1 user test

Situated along the Illinois River valley in Peoria County, this historic city experiences elevated radon conditions due to underlying Ordovician limestone and alluvial soil deposits. Recent testing reveals an average of 5.0 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L and warrants mitigation consideration. The area's mix of historic homes and postwar construction with full basements creates ideal conditions for radon accumulation across zip codes 61602-61615.

5.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Peoria, IL Radon Mitigation

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

Peoria, IL Radon Testing

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

Peoria, Illinois Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Peoria, IL	51-99 Years	Full Basement	Nov 2025

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

Peoria Radon Facts

Key details about the radon risk profile for Peoria and the 61602 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Peoria County, IL

Zip Code

61602

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Peoria and the 61602 zip code are located in Peoria 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 Peoria, IL

What is the average radon level in Peoria, IL?

Based on 1 user-submitted test, the average radon level in Peoria is 5.00 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 Peoria in?

Peoria and the 61602 zip code are in Peoria 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 Peoria?

Radon mitigation in Peoria 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 Peoria?

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