Hong Kong Air Pollutant Emission Inventory - Nitrogen Oxides


Chart for 1997-2015 Nitrogen Oxides (NOx) Emissions


Legend for Nitrogen Oxides (NOx) Emissions

See Data

Relative Significance

Between 1997 and 2015, NOx emissions decreased by 40%.  Navigation, public electricity generation and road transport sectors were the top three sources of NOx emissions, accounting for 37%, 28% and 18% of total NOx emissions in 2015, respectively.

During the same period, NOx levels measured at the EPD's roadside air quality monitoring stations followed closely with the NOx emission trend, indicating that the roadside NOx mainly originates from local emission sources.



User review date: 
Monday, 16 June, 2014