वायु गुणवत्ता डेटा प्रदानकर्ता: the Atmo Auvergne (atmoauvergne.asso.fr)
Note that the measurements for PM2.5 (fine particulate matter), PM10 (respirable particulate matter) and NO2 (nitrogen dioxide) are taken from the station: Gare, Clermont, Auvergne