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 - Tai Po

YEAR	NO₂	PM₁₀	PM_2.5
2023	27	25	15
2022	27	21	14
2021	32	26	16
2020	30	24	15
2019	36	31	20
2018	36	31	19
2017	39	32	22
2016	33	29	20
2015	37	36	23
2014	45	41	27
2013	53	NA	NA
2012	51	41	28
2011	45	46	39
2010	46	45	NA
2009	45	46	NA
2008	52	50	NA
2007	53	53	NA
2006	57	51	NA
2005	49	51	NA
2004	NA	NA	NA
2003	52	54	NA
2002	48	46	NA
2001	50	50	NA
2000	47	48	NA
1999	54	54	NA

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

AAQI Long Term Trend - Tai Po

YEAR	NO₂	PM₁₀	PM_2.5
2023	0.7	1.3	1.5
2022	0.7	1.1	1.4
2021	0.8	1.3	1.6
2020	0.8	1.2	1.5
2019	0.9	1.6	2.0
2018	0.9	1.6	1.9
2017	1.0	1.6	2.2
2016	0.8	1.5	2.0
2015	0.9	1.8	2.3
2014	1.1	2.1	2.7
2013	1.3	NA	NA
2012	1.3	2.1	2.8
2011	1.1	2.3	3.9
2010	1.2	2.3	NA
2009	1.1	2.3	NA
2008	1.3	2.5	NA
2007	1.3	2.7	NA
2006	1.4	2.6	NA
2005	1.2	2.6	NA
2004	NA	NA	NA
2003	1.3	2.7	NA
2002	1.2	2.3	NA
2001	1.3	2.5	NA
2000	1.2	2.4	NA
1999	1.4	2.7	NA

Last revision date: 12:07 20-04-2024