European Radon Day on 7th November was marked by RadoNorm hosting a webinar, where the citizen science projects funded by the European project presented their research and updates. Over 170 participants registered for the webinar, which was opened by Mr. Stefan Mundigl from the Directorate-General of Energy at the European Commission. Participants expressed great interest in the initiatives and creativity of the projects, which are already in full-swing and have engaged a wide range of citizen scientists to test and mitigate against radon. More information on the citizen science projects can be found here. A live recording of the webinar is available https://www.youtube.com/watch?v=yYK7awIomwU&t=7s.