Lisle, IL Radon Levels

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

Based on 4 user-submitted tests, the average radon level is 7.30 pCi/L.

Q: What EPA Radon Zone is Lisle in?

Lisle is in Dupage County, EPA Zone 2.

Q: How much does radon mitigation cost in Lisle?

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

Check local Lisle radon levels and find certified testing and mitigation professionals to keep your home safe

Lisle, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Dupage County, IL

Zip Code 60532

Avg. User Level 7.30 pCi/L

User Tests 4

This western Chicago suburb in DuPage County shows an average radon level of 7.25 pCi/L, significantly exceeding the EPA action threshold. Located in zip code 60532, Lisle's homes sit atop glacial till deposits over limestone bedrock, creating ideal conditions for radon accumulation in the area's predominantly basement-equipped housing stock. The community's four test results range from 5.0 to 12.0 pCi/L, indicating consistently elevated levels that warrant mitigation.

7.30

pCi/L average

Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Lisle, IL. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Lisle, IL Radon Mitigation

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

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Lisle, Illinois Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Lisle, IL	51-99 Years	—	Oct 2025
12 pCi/L	Lisle, IL	51-99 Years	Full Basement	Oct 2020
5 pCi/L	Lisle, IL	21-50 Years	Full Basement	May 2016

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

Dupage County Radon Profile

EPA mapping assigns Dupage County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 25 cities in Dupage County average 6.98 pCi/L across 45 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Dupage County home regardless of zone or a neighbor's results.

Radon FAQ for Lisle, IL

What is the average radon level in Lisle, IL?

Based on 4 user-submitted tests, the average radon level in Lisle is 7.30 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 Lisle in?

Lisle and the 60532 zip code are in Dupage 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 Lisle?

Radon mitigation in Lisle 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 Lisle?

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.

Radon Levels Near Lisle, IL

User-submitted radon levels from the cities closest to Lisle with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Woodridge	3.1 mi	5.00 pCi/L	1
Downers Grove	3.8 mi	14.00 pCi/L	2
Naperville	4.5 mi	6.25 pCi/L	4
Hinsdale	4.7 mi	5.00 pCi/L	1
Wheaton	4.9 mi	4.00 pCi/L	1
Glen Ellyn	5.6 mi	9.00 pCi/L	3
Westmont	5.9 mi	4.00 pCi/L	1
Warrenville	6.1 mi	10.50 pCi/L	2