In its report titled "Overview of EPA’s State and Tribal Indoor Radon Grants Program: A Focus on Activities Conducted During Fiscal Year 2025," the EPA State Indoor Radon Grant Program notes successes in Adoption of State Policies/Regulations or Building Codes.
EPA noted in its report that since 2010, the Illinois Radon Resistant Construction Act has required all homes to be built using RRNC techniques determined by regulations adopted by the Illinois Emergency Management Agency (IEMA). In total, more than 1,900 housing units have been bult with radon reducing features. The IEMA Radon Program continues to provide training to code officials, as well as general contractors, licensed plumbers and local developers, to ensure the proper and effective installation.
Source:
Overview of EPA’s State and Tribal Indoor Radon Grants Program: A Focus on Activities Conducted During Fiscal Year 2025
https://www.epa.gov/system/files/documents/2026-07/sirg-fy25-activities-report.pdf
United States