For instance, during a period of Haze, where the Air Quality Index can deteriorate significantly and fast, the published Air Pollution index is most likely lower than the actual pollution. Similarly, when the air polution decreases, the Air Quality Index can still be very high although the pollution is gone.Read more here.
Données sur la qualité de l'air fournies par : the Malaysia Department of Environment (DOE); Air Polluant Index Management System (apims.doe.gov.my)