داده های کیفیت هوا ارائه شده توسط: the Czech Hydrometeorological Institute (Český hydrometeorologický ústav) (portal.chmi.cz)
Note that the measurements for PM2.5 (fine particulate matter), PM10 (respirable particulate matter) and NO2 (nitrogen dioxide) are taken from the station: CZ:Prague/Praha 5-Smichov