Air Pollutant Concentrations Trend - Tsuen Wan
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 40 | 24 | 15 |
| 2022 | 39 | 22 | 14 |
| 2021 | 44 | 24 | 16 |
| 2020 | 36 | 24 | 15 |
| 2019 | 46 | 30 | 20 |
| 2018 | 45 | 30 | 20 |
| 2017 | 52 | 33 | 22 |
| 2016 | 56 | 31 | 21 |
| 2015 | 59 | 36 | 24 |
| 2014 | 57 | 42 | 28 |
| 2013 | 63 | 47 | 31 |
| 2012 | 61 | 42 | 29 |
| 2011 | 64 | 50 | 35 |
| 2010 | 63 | 45 | 30 |
| 2009 | 61 | 49 | 32 |
| 2008 | 64 | 53 | 37 |
| 2007 | 64 | 59 | 41 |
| 2006 | 64 | 57 | 41 |
| 2005 | 61 | 58 | 43 |
| 2004 | 69 | 63 | 46 |
| 2003 | NA | NA | NA |
| 2002 | 64 | 51 | 35 |
| 2001 | 63 | 53 | 37 |
| 2000 | 61 | 50 | 33 |
| 1999 | 67 | 54 | 37 |
AAQI Long Term Trend - Tsuen Wan
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 1.0 | 1.2 | 1.5 |
| 2022 | 1.0 | 1.1 | 1.4 |
| 2021 | 1.1 | 1.2 | 1.6 |
| 2020 | 0.9 | 1.2 | 1.5 |
| 2019 | 1.2 | 1.5 | 2.0 |
| 2018 | 1.1 | 1.5 | 2.0 |
| 2017 | 1.3 | 1.7 | 2.2 |
| 2016 | 1.4 | 1.6 | 2.1 |
| 2015 | 1.5 | 1.8 | 2.4 |
| 2014 | 1.4 | 2.1 | 2.8 |
| 2013 | 1.6 | 2.4 | 3.1 |
| 2012 | 1.5 | 2.1 | 2.9 |
| 2011 | 1.6 | 2.5 | 3.5 |
| 2010 | 1.6 | 2.3 | 3.0 |
| 2009 | 1.5 | 2.5 | 3.2 |
| 2008 | 1.6 | 2.7 | 3.7 |
| 2007 | 1.6 | 3.0 | 4.1 |
| 2006 | 1.6 | 2.9 | 4.1 |
| 2005 | 1.5 | 2.9 | 4.3 |
| 2004 | 1.7 | 3.2 | 4.6 |
| 2003 | NA | NA | NA |
| 2002 | 1.6 | 2.6 | 3.5 |
| 2001 | 1.6 | 2.7 | 3.7 |
| 2000 | 1.5 | 2.5 | 3.3 |
| 1999 | 1.7 | 2.7 | 3.7 |