Air Pollutant Concentrations Trend - Kwun Tong
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 41 | 26 | 15 |
| 2022 | 45 | 24 | 14 |
| 2021 | 49 | 31 | 17 |
| 2020 | 43 | 32 | 16 |
| 2019 | 45 | 38 | 21 |
| 2018 | 43 | 38 | 22 |
| 2017 | 44 | 39 | 23 |
| 2016 | 54 | 37 | 23 |
| 2015 | 55 | 44 | 27 |
| 2014 | 54 | 51 | 31 |
| 2013 | 59 | 52 | 33 |
| 2012 | 59 | 43 | 28 |
| 2011 | 63 | 49 | 31 |
| 2010 | 59 | 47 | NA |
| 2009 | 58 | 48 | NA |
| 2008 | 59 | 47 | NA |
| 2007 | 63 | 53 | NA |
| 2006 | 61 | 55 | NA |
| 2005 | 58 | 56 | NA |
| 2004 | 66 | 61 | NA |
| 2003 | 68 | 54 | NA |
| 2002 | NA | NA | NA |
| 2001 | 75 | 56 | NA |
| 2000 | 69 | 52 | NA |
| 1999 | 78 | 52 | NA |
AAQI Long Term Trend - Kwun Tong
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 1.0 | 1.3 | 1.5 |
| 2022 | 1.1 | 1.2 | 1.4 |
| 2021 | 1.2 | 1.6 | 1.7 |
| 2020 | 1.1 | 1.6 | 1.6 |
| 2019 | 1.1 | 1.9 | 2.1 |
| 2018 | 1.1 | 1.9 | 2.2 |
| 2017 | 1.1 | 2.0 | 2.3 |
| 2016 | 1.4 | 1.9 | 2.3 |
| 2015 | 1.4 | 2.2 | 2.7 |
| 2014 | 1.4 | 2.6 | 3.1 |
| 2013 | 1.5 | 2.6 | 3.3 |
| 2012 | 1.5 | 2.2 | 2.8 |
| 2011 | 1.6 | 2.5 | 3.1 |
| 2010 | 1.5 | 2.4 | NA |
| 2009 | 1.5 | 2.4 | NA |
| 2008 | 1.5 | 2.4 | NA |
| 2007 | 1.6 | 2.7 | NA |
| 2006 | 1.5 | 2.8 | NA |
| 2005 | 1.5 | 2.8 | NA |
| 2004 | 1.7 | 3.1 | NA |
| 2003 | 1.7 | 2.7 | NA |
| 2002 | NA | NA | NA |
| 2001 | 1.9 | 2.8 | NA |
| 2000 | 1.7 | 2.6 | NA |
| 1999 | 2.0 | 2.6 | NA |