The Radon Report Card: Risk and Response
Population and Lung Cancer      Total Population: 12,723,071
Lung Cancer Deaths:
Age-Adjusted Lung Cancer Incidence Rate
(per 100,000) 59
Lung Cancer Cases
Radon-Induced Lung Cancer Cases
  * Medical Costs (hospital, medicine, doctors)
  * Economic Costs (lost wages / productivity)

Buildings and Exposure Potential
Pre-Mitigation Radon Tests: 108,909
Percent by Radon Level  
  < 2 pCi/L

  ≥ 2 to < 4 pCi/L

  ≥ 4 pCi/L

Housing Units by Structure Type
1 to 4 Units 5 or More Units Total
Existing 4,237,533 1,121,167 5,358,700
New 10,070 10,454 20,524
Public Schools: 4,350

EPA and ANSI-AARST Radon Measurement Standards recommend fixing a building with a radon level ≥ (above or equal to) 4 pCi/L and consider fixing it if any radon level is ≥ 2 and < (below) 4 pCi/L.
Statewide Radon Policies
Credential Required State License
Radon Standards in Effect IL Regulations
Homebuyer Protection Required Notification & Disclosure
Radon System Requirement for New Homes All Counties
    Type of New Home Where Required All Residential
    Standard/Code for Radon System in New Homes IRC Appendix F modified
School Testing Required Recommended
Radon System Requirement for New Schools Recommended