Air Pollutant Concentrations Trend - Causeway Bay
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 67 | 39 | 23 |
| 2022 | 65 | 34 | 21 |
| 2021 | 71 | 39 | 23 |
| 2020 | 68 | 36 | 22 |
| 2019 | 81 | 43 | 27 |
| 2018 | 87 | 46 | 30 |
| 2017 | 97 | 46 | 31 |
| 2016 | 89 | 45 | 32 |
| 2015 | 106 | 55 | 37 |
| 2014 | 103 | 57 | 38 |
| 2013 | 121 | 64 | 45 |
| 2012 | 117 | 61 | 42 |
| 2011 | 124 | 66 | 44 |
| 2010 | 116 | 66 | NA |
| 2009 | 109 | 71 | NA |
| 2008 | 96 | 79 | NA |
| 2007 | 90 | 85 | NA |
| 2006 | 95 | 83 | NA |
| 2005 | 95 | 84 | NA |
| 2004 | 93 | 88 | NA |
| 2003 | 91 | 81 | NA |
| 2002 | 94 | 80 | NA |
| 2001 | 105 | 97 | NA |
| 2000 | 98 | 101 | NA |
| 1999 | 105 | 105 | NA |
AAQI Long Term Trend - Causeway Bay
| YEAR | NO2 | PM10 | PM2.5 |
|---|---|---|---|
| 2023 | 1.7 | 2.0 | 2.3 |
| 2022 | 1.6 | 1.7 | 2.1 |
| 2021 | 1.8 | 2.0 | 2.3 |
| 2020 | 1.7 | 1.8 | 2.2 |
| 2019 | 2.0 | 2.2 | 2.7 |
| 2018 | 2.2 | 2.3 | 3.0 |
| 2017 | 2.4 | 2.3 | 3.1 |
| 2016 | 2.2 | 2.3 | 3.2 |
| 2015 | 2.7 | 2.8 | 3.7 |
| 2014 | 2.6 | 2.9 | 3.8 |
| 2013 | 3.0 | 3.2 | 4.5 |
| 2012 | 2.9 | 3.1 | 4.2 |
| 2011 | 3.1 | 3.3 | 4.4 |
| 2010 | 2.9 | 3.3 | NA |
| 2009 | 2.7 | 3.6 | NA |
| 2008 | 2.4 | 4.0 | NA |
| 2007 | 2.3 | 4.3 | NA |
| 2006 | 2.4 | 4.2 | NA |
| 2005 | 2.4 | 4.2 | NA |
| 2004 | 2.3 | 4.4 | NA |
| 2003 | 2.3 | 4.1 | NA |
| 2002 | 2.4 | 4.0 | NA |
| 2001 | 2.6 | 4.9 | NA |
| 2000 | 2.5 | 5.1 | NA |
| 1999 | 2.6 | 5.3 | NA |