HKIA continuously tracks outdoor air quality through two airport monitoring stations and a third station on Sha Chau, an island several kilometres to the north of HKIA. The wealth of data we collect helps us monitor regional air quality and keep track of the progress of our pollution reduction initiatives. Click here for the current Air Pollution Index and data for Fine Suspended Particulates. In addition, the Institute for the Environment of the Hong Kong University of Science and Technology has conducted an Airport Operational Air Quality Study. Click here for details.