Steward, IL Radon Levels

Q: What EPA Radon Zone is Steward in?

Steward is in Lee County, EPA Zone 1.

Q: How much does radon mitigation cost in Steward?

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

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

Steward, IL Radon Facts

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

County Lee County, IL

Zip Code 60553

This small community in northern Illinois' Lee County sits on glacial till deposits that characterize the region's moderate-to-high radon potential. Testing data for zip code 60553 is currently limited, though the area's geological setting suggests caution is warranted. Given Illinois' glacial geology and limestone bedrock, professional radon testing is recommended for all homes, particularly those with basements where radon accumulation is most common.

9.25

pCi/L area average

Above EPA Action Level

Lee County average: 9.25 pCi/L, based on 4 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Steward 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+

Steward, 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 Steward, IL

No homeowner tests have been submitted for Steward 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
Rochelle	6.3 mi	13.00 pCi/L	1
Ashton	10.0 mi	4.00 pCi/L	1
Dekalb	13.9 mi	8.75 pCi/L	4
Cortland	17.5 mi	5.00 pCi/L	1
Earlville	18.9 mi	11.00 pCi/L	1
Sycamore	19.3 mi	16.00 pCi/L	2
Amboy	19.8 mi	5.00 pCi/L	1
Stillman Valley	20.8 mi	5.00 pCi/L	1

Lee County Radon Profile

Lee 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 3 cities in Lee County average 9.25 pCi/L across 4 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 Lee County to test, as levels can differ between neighboring homes.

Radon FAQ for Steward, IL

What EPA Radon Zone is Steward in?

Steward and the 60553 zip code are in Lee 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 Steward?

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

Radon mitigation in Steward 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 Steward?

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.