Radon Mitigation in Peoria, IL

Radon Mitigation in Peoria, Illinois

Peoria and Peoria County sit in EPA Radon Zone 1. Central Illinois has some of the state's highest radon concentrations, and the Peoria metro — including East Peoria, Morton, Washington, and Pekin — shows consistent elevated readings. Illinois's radon average of 4.6 pCi/L already exceeds the EPA action level, and Zone 1 areas like Peoria County run higher.

Why Peoria Homes Test High

Peoria's geology sits on glacial till overlaying limestone and shale in the Illinois River valley. The Illinois River bluffs and surrounding uplands create varied radon risk across short distances — some Peoria neighborhoods test routinely high while nearby areas show more modest results, making individual home testing essential.

Peoria's housing stock includes substantial pre-1960 construction with full basements, and Illinois's cold winters concentrate indoor radon from November through March.

What Radon Mitigation Costs in Peoria

• Poured concrete basement: $800–$1,300
• Block foundation: $1,000–$1,600
• Crawl space: $900–$1,500

Average job duration is one day.

Illinois IEMA Licensing Requirement

Illinois requires radon contractors to hold an IEMA license in addition to NRPP or NRSB national certification. Both are required by state law.

Finding a Certified Mitigator in Peoria

Find a Certified Radon Mitigator in Peoria →

Peoria County has IEMA-licensed, NRPP-certified contractors serving the greater Peoria metro. Average mitigation costs run $900–$1,300.