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Hong Kong Air Pollutant Emission Inventory - Public Electricity Generation

Sectoral Analysis for Public Electricity Generation

 Emission from Public Electricity Generation

Electricity sector had been a major contributor to SO2, NOx and RSP emissions.   Subsequent to the imposition of statutory emission caps on power plants, its SO2 emissions reduced substantially by 85%, NOx emissions by 54% and RSP emissions by 77% from 1997 to 2016, despite an increase in electricity consumption of 37%.  In 2016, the emissions of SO2, NOx and RSP accounted for 46%, 29% and 14% of the total emissions, respectively.

The emissions of SO2, NOx and RSP from power sector continue to show a decreasing trend from 2010 to 2016, as power companies increased the use of natural gas for electricity generation in order to meet the emission caps set out in the Technical Memorandum (TM).  The proportion of natural gas in the fuel mix would be increased to around 50% by 2020.

The EPD has progressively tightened the emission caps since 2005.  In 2008, we stipulated the stringent emission caps for 2010 and beyond through the first TM for power plants.  The seventh TM was issued in 2017 to further tighten the emissions of air pollutants from 2022 onwards.  By 2022, the emission caps of SO2, NOx and RSP would be reduced by 79%, 59% and 61% respectively, as compared to the emission caps for 2010. 

User review date: 
Tuesday, 16 June, 2015