Lanark, IL Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 12.00 pCi/L.

Q: What EPA Radon Zone is Lanark in?

Lanark is in Carroll County, EPA Zone 1.

Q: How much does radon mitigation cost in Lanark?

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

Avg: 12.00 pCi/L

Carroll County

EPA Zone 1

3 user tests

Lanark is located in Carroll County, Illinois. With 3 user-submitted readings averaging 12.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 61046 zip code.

12.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Lanark, IL Radon Mitigation

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

Lanark, IL Radon Testing

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

Lanark, Illinois Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
9 pCi/L	Lanark, IL	21-50 Years	Full Basement	Sep 2025
20 pCi/L	Lanark, IL	21-50 Years	Full Basement	Apr 2024
7 pCi/L	Lanark, IL	0-20 Years	Full Basement	Nov 2017

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

Lanark Radon Facts

Key details about the radon risk profile for Lanark and the 61046 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Carroll County, IL

Zip Code

61046

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

12.00 pCi/L

User Tests Submitted

Lanark and the 61046 zip code are located in Carroll 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 Lanark, IL

What is the average radon level in Lanark, IL?

Based on 3 user-submitted tests, the average radon level in Lanark is 12.00 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 Lanark in?

Lanark and the 61046 zip code are in Carroll 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 Lanark?

Radon mitigation in Lanark 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 Lanark?

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