The International Radon and Vapor Intrusion Symposium brings trade professionals, scientists, educators, policymakers, advocates, consumers and more together to learn, collaborate and connect. The Symposium attracts over 600 attendees annually from around the world. This year the Symposium will occur October 11-13 2021, northwest of our nation’s Capital in Bethesda, Maryland.


Call for Abstracts and Presentations is Open

Come celebrate with AARST!

The International Radon Symposium is the highlight of our year! We attend many excellent conferences in Europe. The scale of the AARST Symposium, thanks to the breadth of knowledge and experience shared by attendees, makes it invaluable for us. 

Rebecca Coates

Great technical and real world presentations. I learned a tremendous amount of new information and skillsets. Networking with other attendees and radon businesses was great and valuable in growing my business.

Nate Burden

The symposium is a great opportunity to learn, share, and increase action in radon reduction.


Gloria Linnertz

Event Details