Hong Kong Air Pollutant Emission Inventory - Nitrogen Oxides


Chart for 1997-2016 Nitrogen Oxides (NOx) Emissions


Legend for Nitrogen Oxides (NOx) Emissions

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Relative Significance

Between 1997 and 2016, NOx emissions decreased by 39%.  Navigation, public electricity generation and road transport sectors were the top three sources of NOx emissions, accounting for 37%, 29% and 18% of total NOx emissions in 2016, respectively.

During the same period, NOx levels measured at the EPD’s roadside air quality monitoring stations by and large followed the NOx emission trend, indicating that the roadside NOx mainly originates from local emission sources.

User review date: 
Monday, 16 June, 2014