EPD - Annual AQI Trend

Air Quality Health Index

Welcome to Environmental Protection Department Air Quality Health Index Website

General Stations

Central/WesternSouthernEasternKwun TongSham Shui PoKwai ChungTsuen WanTseung Kwan OYuen LongTuen MunTung ChungTai PoSha TinNorthTap Mun

Roadside Stations

Causeway BayCentralMong Kok

Annual AQI Trend

Air Pollutant Concentrations Trend

Air Pollutant Concentrations Trend - Tap Mun

YEAR	NO₂	PM₁₀	PM_2.5
2023	8	22	12
2022	8	20	12
2021	10	23	14
2020	9	25	14
2019	10	31	17
2018	11	31	17
2017	10	35	20
2016	NA	NA	NA
2015	NA	NA	NA
2014	10	44	27
2013	11	49	30
2012	11	38	25
2011	12	47	31
2010	13	41	26
2009	11	44	28
2008	14	52	35
2007	15	53	38
2006	13	48	34
2005	14	50	38
2004	16	53	41
2003	13	47	35
2002	13	39	27
2001	11	43	30
2000	11	38	26
1999	12	44	31

* Pollutant concentrations in micrograms per cubic metre (μg/m³)

AAQI Long Term Trend - Tap Mun

YEAR	NO₂	PM₁₀	PM_2.5
2023	0.2	1.1	1.2
2022	0.2	1.0	1.2
2021	0.3	1.2	1.4
2020	0.2	1.3	1.4
2019	0.3	1.6	1.7
2018	0.3	1.6	1.7
2017	0.3	1.8	2.0
2016	NA	NA	NA
2015	NA	NA	NA
2014	0.3	2.2	2.7
2013	0.3	2.5	3.0
2012	0.3	1.9	2.5
2011	0.3	2.4	3.1
2010	0.3	2.1	2.6
2009	0.3	2.2	2.8
2008	0.4	2.6	3.5
2007	0.4	2.7	3.8
2006	0.3	2.4	3.4
2005	0.4	2.5	3.8
2004	0.4	2.7	4.1
2003	0.3	2.4	3.5
2002	0.3	2.0	2.7
2001	0.3	2.2	3.0
2000	0.3	1.9	2.6
1999	0.3	2.2	3.1

Last revision date: 07:07 20-04-2024