Annual AQI Trend

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Air Pollutant Concentrations Trend - Yuen Long

YEAR NO2 PM10 PM2.5
2016 46 37 23
2015 45 44 30
2014 52 50 35
2013 54 56 37
2012 49 44 29
2011 54 54 36
2010 54 49 32
2009 52 51 33
2008 56 60 41
2007 55 64 43
2006 58 62 43
2005 58 62 42
2004 67 71 NA
2003 60 61 NA
2002 56 53 NA
2001 61 57 NA
2000 57 56 NA
1999 60 62 NA
* Pollutant concentrations in micrograms per cubic metre (μg/m3)

AAQI Long Term Trend - Yuen Long

YEAR NO2 PM10 PM2.5
2016 1.2 1.9 2.3
2015 1.1 2.2 3.0
2014 1.3 2.5 3.5
2013 1.4 2.8 3.7
2012 1.2 2.2 2.9
2011 1.4 2.7 3.6
2010 1.4 2.5 3.2
2009 1.3 2.6 3.3
2008 1.4 3.0 4.1
2007 1.4 3.2 4.3
2006 1.5 3.1 4.3
2005 1.5 3.1 4.2
2004 1.7 3.6 NA
2003 1.5 3.1 NA
2002 1.4 2.7 NA
2001 1.5 2.9 NA
2000 1.4 2.8 NA
1999 1.5 3.1 NA
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Last revision date:10:06 21-11-2017