News —
Radonova highlights home testing and retesting at the Indoor Environments 2026 symposium
Radonova presented Swedish research on radon retesting and exchanged experiences on expanding home testing at the 40th annual Indoor Environments Radon and Vapor Intrusion Symposium in Norfolk, Virginia, October 4–7. Formerly the AARST International Radon and Vapor Intrusion Symposium, the event brought together researchers, industry professionals, public health advocates, and government representatives. Radonova participated as an exhibitor and sponsor.
Organized by the Indoor Environments Association (IEA), the symposium covered research, measurement and mitigation practices, standards, policy, and public awareness. For Radonova, it also provided opportunities to reconnect with colleagues and customers, meet new contacts, and discuss ways to reduce radon exposure.
Reaching more households
Among Radonova’s highlights were presentations by Alexis Gigliello of the American Lung Association on improving at-home radon test kit use, and Brian Hanson and fellow presenters on partnerships to expand access to home testing in Kansas. Both offered useful perspectives for Radonova’s efforts to bring long-term radon testing to more homes across the United States.
“The conversations in Norfolk gave us a lot to take home, from ideas for reaching more households to discussions about measurement practices,” said Benjamin Portin, Vice President, Radonova Laboratories, North America. “We appreciate everyone who stopped by our booth and shared their experiences. Those exchanges help us understand where better access to testing and practical support can make a difference.”
Why earlier low results need follow-up
Radonova’s Senior Scientific Advisor Dr. Tryggve Rönnqvist presented Experiences from Repeated Measurements in Swedish Schools and Multi-Family Houses, examining radon testing conducted again years after an initial measurement.
His analysis indicated that municipal oversight of initial testing in Swedish schools and preschools generally works well. However, some repeat measurements approximately ten years later found concentrations above Sweden’s reference level of 200 Bq/m³, despite all initial measurement locations having been below 100 Bq/m³.
The findings support the Swedish Radiation Safety Authority’s recommendation to repeat measurements every ten years and show why an earlier low result should not be treated as permanent confirmation of low radon levels.
Repeat measurements were identified in approximately half of the municipalities studied, suggesting substantial differences in how retesting is required or carried out. For schools and preschools, the findings underline the value of both initial testing and regular follow-up.
Radonova thanks the organizers, speakers, fellow exhibitors, and everyone who visited our booth for sharing their knowledge and experiences. We were proud to support the symposium and look forward to continuing the conversations.
