We would like to inform you that the CAMS European air quality validated reanalysis 2020 data are now available from the ADS at: https://ads.atmosphere.copernicus.eu/cdsapp#!/dataset/cams-europe-air-quality-reanalyses?tab=overview
Users can download data either interactively using the ADS web interface (download form) or programmatically using the API service.
If you have any question, please raise a ticket by logging onto our secure Support Portal.
Kind regards
ECMWF Support