Oswego, IL Radon Levels

Q: What EPA Radon Zone is Oswego in?

Oswego is in Kendall County, EPA Zone 1.

Q: Why are radon readings shown from areas near Oswego?

No homeowner radon tests have been submitted for Oswego yet, so readings from the closest cities and the Kendall County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Oswego?

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

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

Oswego, IL Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Kendall County, IL

Zip Code 60543

Positioned in Kendall County within the western suburbs of the Chicago metro, Oswego sits atop glacial till deposits from the Wisconsin glaciation. The community's geologyâ€”dense clay and glacial drift over limestone bedrockâ€”creates soil conditions highly favorable for radon gas production and migration. While specific testing data for zip code 60543 is limited, the area's geological characteristics suggest homeowners should prioritize radon testing in their predominantly single-family homes with full basements.

8.33

pCi/L area average

Above EPA Action Level

Kendall County average: 8.33 pCi/L, based on 6 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Oswego 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+

Oswego, 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 Oswego, IL

No homeowner tests have been submitted for Oswego 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
Montgomery	2.4 mi	8.50 pCi/L	2
Aurora	6.0 mi	6.75 pCi/L	4
Yorkville	6.0 mi	6.00 pCi/L	2
Sugar Grove	7.9 mi	7.00 pCi/L	1
North Aurora	8.6 mi	7.00 pCi/L	2
Plainfield	8.7 mi	6.33 pCi/L	3
Plano	10.0 mi	10.00 pCi/L	1
Naperville	10.6 mi	6.25 pCi/L	4

Kendall County Radon Profile

Kendall County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Kendall County average 8.33 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Kendall County to test, as levels can differ between neighboring homes.

Radon FAQ for Oswego, IL

What EPA Radon Zone is Oswego in?

Oswego and the 60543 zip code are in Kendall 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.

Why are radon readings shown from areas near Oswego?

No homeowner radon tests have been submitted for Oswego yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Kendall County average—are the best available indicator of local conditions until Oswego 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 Oswego?

Radon mitigation in Oswego 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 Oswego?

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.