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Air Quality Data provided by Atmo en Hauts-de-France - Pas-de-Calais (atmo-hdf.fr)
Note that the measurement for and PM2.5 (fine particulate matter) are taken from the station Harnes, Nord-Pas-de-Calais and the measurement for and SO2 (sulfur dioxide) are taken from the station Douai Theuriet, Nord-Pas-de-Calais