Radon Mitigation Services in Illinois

Reduce elevated radon levels in your Illinois home with proven radon mitigation systems designed for local soil conditions, foundation types, and building styles common throughout the state.

Radon is a widespread indoor air quality issue in Illinois. Homes across the state — from major metro areas to smaller communities — frequently test at or above the EPA’s recommended action level. Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Request a Radon Mitigation Quote

Why Radon Is a Serious Issue in Illinois Homes

Illinois consistently reports elevated residential radon levels due to a combination of glacial soils, underlying rock formations, and widespread basement construction. These conditions allow radon gas to migrate from the ground into homes through cracks, sump pits, crawlspaces, and foundation gaps.

Because radon is invisible and odorless, many homeowners are unaware of elevated levels until testing is performed. Radon issues occur statewide and are not limited to a specific region or home style.

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Radon Levels Reported Across Illinois

Browse major metro areas in Illinois and explore nearby cities and suburbs. Each listing includes a local phone number and (when available) homeowner-submitted radon data.

Champaign-Urbana Metro Area

Chicago Metro Area

Peoria Metro Area

Quad Cities Metro Area

Rockford Metro Area

Springfield Metro Area

St. Louis Metro Area (IL)

How Radon Mitigation Works

Most homes are fixed with a venting system (often called “sub-slab depressurization”). A pipe and fan pull radon from under the foundation and vent it safely outside.

Typical Mitigation Cost in Illinois

Costs vary by foundation type, routing complexity, and whether additional sealing is needed. The quote process is quick and most installs are completed in a day.

What affects price?

• Basement vs. crawlspace vs. slab
• Number of suction points required
• Electrical access for the fan
• Finished spaces and routing complexity
• Need for sealing, sump covers, or crawlspace liner

Typical cost: $800–$1,500

FAQ

What radon level is considered “high”?

The EPA action level is 4.0 pCi/L — many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L.

Does mitigation work?

Yes — properly installed systems typically reduce radon significantly. Verification testing confirms performance.

Should I test again after mitigation?

Yes. A post-mitigation test is the proof your system is working. Many homeowners re-test periodically.

 

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