Past 24 hours Pollutant Concentration and AQHI

RSP - Respirable Suspended Pariculates

FSP - Fine Suspended Pariculates

NO₂ - Nitrogen Dioxide

O₃ - Ozone

SO₂ - Sulphur Dioxide

CO - Carbon Monoxide

AQHI - Air Quality Health Index

Concentrations in micrograms per cubic meter (m³).

Pollutant concentrations and AQHI information are based on raw data obtained directly from HKIA’s three air quality monitoring stations and making reference to the HKSAR AQHI calculation.

Value marked with an asterisk “*” refers to data used for calculation of AQHI was adopted from other stations.

“-“ means that the data is temporarily unavailable.