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Grab Our Research > KEY ENVIRONMENT STATISTICS

CLEAN AIR

Pollutant Averaging Time Unit 2007 2008 2009 2010 2011 2012 WHO AQG2
Sulphur Dioxide (SO2) 24-hour μg/m3 80 76 83 94 70 94 20
  Annual1 μg/m3 12 11 9 11 10 13 -
Nitrogen Dioxide (NO2) 1-hour μg/m3 Not available Not available 103 121 159 136 200
  Annual μg/m3 22 22 22 23 25 25 40
Carbon Monoxide (CO) 1-hour mg/m3 2.3 2.3 2.4 2.7 2.3 2.3 30
  8-hour mg/m3 1.7 1.5 1.7 2.2 2.0 1.8 10
Ozone 8-hour μg/m3 140 103 100 129 110 112 100
Particulate Matter PM10 24-hour μg/m3 69 57 77 127 76 74 50
  Annual μg/m3 Not available Not available 29 26 27 29 20
Particulate Matter PM2.5 24-hour μg/m3 35 30 39 40 35 39 25
  Annual3 μg/m3 19 16 19 17 17 19 10

 

 

1 Singapore's Sustainable Development Blueprint 2020 target for SO2 (annual) is 15μg/m3
2 World Health Organisation Air Quality Guidelines window
3 Singapore's Sustainable Development Blueprint 2020 target for PM2.5 (annual) is 12μg/m3

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