Fox Valley, IL Radon Levels

Q: What EPA Radon Zone is Fox Valley in?

Fox Valley is in Dupage County, EPA Zone 2.

Q: How much does radon mitigation cost in Fox Valley?

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

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

Fox Valley, IL Radon Facts

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

County Dupage County, IL

Zip Code 60599

Fox Valley in DuPage County represents part of the western suburban Chicago metro corridor, built primarily on glacial till soils. The area's predominantly suburban housing stock features full basements typical of northern Illinois construction. With no current radon testing data available for zip code 60599, homeowners should conduct testing to establish their properties' radon levels.

6.98

pCi/L area average

Above EPA Action Level

Dupage County average: 6.98 pCi/L, based on 45 user-submitted tests across 25 cities in the county. No homeowner readings have been submitted for Fox Valley itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Fox Valley, IL Radon Mitigation

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

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Radon Readings Near Fox Valley, IL

No homeowner tests have been submitted for Fox Valley yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Wheaton	1.3 mi	4.00 pCi/L	1
Glen Ellyn	2.2 mi	9.00 pCi/L	3
Carol Stream	3.0 mi	6.00 pCi/L	1
Lisle	3.7 mi	7.25 pCi/L	4
Winfield	4.0 mi	5.75 pCi/L	4
Hinsdale	4.3 mi	5.00 pCi/L	1
Lombard	4.4 mi	6.25 pCi/L	4
Warrenville	5.4 mi	10.50 pCi/L	2

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 Fox Valley, IL

What EPA Radon Zone is Fox Valley in?

Fox Valley and the 60599 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.

Why are radon readings shown from areas near Fox Valley?

No homeowner radon tests have been submitted for Fox Valley yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Dupage County average—are the best available indicator of local conditions until Fox Valley homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Fox Valley?

Radon mitigation in Fox Valley 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 Fox Valley?

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.