We would like to inform you that the CAMS European air quality validated ensemble surface reanalysis data from 2013 to 2017 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.
For details on data availability please check the documentation here.
If you have any question, please raise a ticket by logging onto our secure Support Portal.
Kind regards
ECMWF Support