Air Pollutant Concentrations Trend - Kwai Chung
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 50 | 25 | 16 |
| 2022 | 44 | 23 | 15 |
| 2021 | 52 | 26 | 16 |
| 2020 | 48 | 23 | 14 |
| 2019 | 54 | 29 | 18 |
| 2018 | 55 | 32 | 20 |
| 2017 | 57 | 35 | 23 |
| 2016 | 59 | 33 | 22 |
| 2015 | 64 | 37 | 25 |
| 2014 | 67 | 41 | 28 |
| 2013 | 69 | 46 | 32 |
| 2012 | 64 | 42 | 29 |
| 2011 | 67 | 48 | 30 |
| 2010 | 65 | 45 | NA |
| 2009 | 64 | 47 | NA |
| 2008 | 66 | 52 | NA |
| 2007 | 61 | 60 | NA |
| 2006 | 58 | 58 | NA |
| 2005 | 63 | 58 | NA |
| 2004 | 70 | 62 | NA |
| 2003 | 70 | 56 | NA |
| 2002 | 67 | 48 | NA |
| 2001 | 69 | 53 | NA |
| 2000 | 69 | 51 | NA |
| 1999 | 72 | 56 | NA |
AAQI Long Term Trend - Kwai Chung
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 1.3 | 1.3 | 1.6 |
| 2022 | 1.1 | 1.2 | 1.5 |
| 2021 | 1.3 | 1.3 | 1.6 |
| 2020 | 1.2 | 1.2 | 1.4 |
| 2019 | 1.4 | 1.5 | 1.8 |
| 2018 | 1.4 | 1.6 | 2.0 |
| 2017 | 1.4 | 1.8 | 2.3 |
| 2016 | 1.5 | 1.7 | 2.2 |
| 2015 | 1.6 | 1.9 | 2.5 |
| 2014 | 1.7 | 2.1 | 2.8 |
| 2013 | 1.7 | 2.3 | 3.2 |
| 2012 | 1.6 | 2.1 | 2.9 |
| 2011 | 1.7 | 2.4 | 3.0 |
| 2010 | 1.6 | 2.3 | NA |
| 2009 | 1.6 | 2.4 | NA |
| 2008 | 1.7 | 2.6 | NA |
| 2007 | 1.5 | 3.0 | NA |
| 2006 | 1.5 | 2.9 | NA |
| 2005 | 1.6 | 2.9 | NA |
| 2004 | 1.8 | 3.1 | NA |
| 2003 | 1.8 | 2.8 | NA |
| 2002 | 1.7 | 2.4 | NA |
| 2001 | 1.7 | 2.7 | NA |
| 2000 | 1.7 | 2.6 | NA |
| 1999 | 1.8 | 2.8 | NA |