Is Radon Common in Chicagoland?

Yes — Illinois, including the greater Chicagoland area and surrounding suburbs, has elevated radon potential in a number of locations, largely due to regional soil composition and underlying geology.

Radon originates from the natural breakdown of uranium in soil and rock, and certain soil types allow it to move more easily toward the surface — and into homes — than others.

What Regional Radon Risk Means for Your Home

It's important to understand what "common in the area" actually means for your specific home, though. Radon levels can vary significantly even between neighboring properties, based on differences in foundation type, construction, ventilation, and hyper-local soil conditions beneath each specific lot.

A neighbor's clean radon test doesn't tell you anything reliable about your own home — the only way to know your home's actual radon level is to test it directly.

Why Chicagoland Homes Should Be Tested

This regional pattern is part of why radon testing is a routine recommendation for Chicagoland-area homeowners regardless of a home's age, size, or apparent condition.

It's not about visible risk factors — since radon produces none — it's about the underlying geology of the region, which doesn't change based on how a house looks or when it was built.

Where Radon Testing Matters Most

Testing is especially worth prioritizing for lower-level living spaces and basements, since radon typically enters through foundation-level openings and tends to concentrate at the lowest livable level of a home before dispersing upward.

Schedule a radon or mold test today with DezAir Quality Testing online at dezairqualitytesting.com.