On September 29th, 2025, RI-URBANS hosted a highly engaging webinar on Source Apportionment, bringing together over 200 participants from across Europe and beyond. The session highlighted innovative tools and strategies to identify and quantify pollution sources in urban environments as an essential step toward improving air quality and public health.

The webinar featured contributions from leading experts in the field, who presented different approaches to source apportionment, including:

• 24h resolution PM chemistry data

• High-time resolution organic aerosol measurement

• High-time resolution trace elements measurements

• Comparisons of datasets with different time resolutions

• Black Carbon source apportionment

• Ultrafine Particles source apportionment

• Oxidative Potential source apportionment

• VOC source apportionment

The event concluded with a lively Q&A session, where participants had the opportunity to exchange ideas directly with the speakers.

The full recording of the webinar is now available here