Statistics
Year 1986 1991 1996 1997 1998 1999 2000 2001
Mg/ cubic metre 67 48 52 60 51 56.55 52.36 55.07
Year 2002 2003 2004 2005 2006 2007 2008 2009
Mg/ cubic metre 51.56 54.12 58.28 50.48 52.95 52.79 52.85 49.41
Year 2010 2011 2012 2013 2014 2015 2016 2017
Mg/ cubic metre 51.49 52.92 50.95 53.72 49.07 46.40 43.37 40.18
Year 2018
Mg/ cubic metre 38.82

Operational Definitions

The Air Pollution Index (API) converts air pollution data from several types of pollutants into a value ranging from 0 to 500. These pollutants are Nitrogen Dioxide (NO2), Ozone (O3), Respirable Suspended Particulate (RSP), Carbon Dioxide (CO2). The highest number among all the four pollutants is reported as the API hourly. Figures shown in the table are ratio of Annual Average Concentration of the pollutants to the Air Quality Objectives set by the Environmental Protection Department and annually average concentration rates of NO2.
Download file
File name: no2_annual_average_concentration.pdf   The file you want to download is in PDF format. If you can't open it, please download and install the Adobe Reader. Get Adobe Reader
Top