EPD - Pollutant and AQHI Distribution

Pollutant and AQHI Distribution

(At 2024-04-27 13:00)

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
General Stations
	Pollutant Concentrations(μg/m³)
Central/Western	14.4	36	1.3		20.6	9.5	2
Southern	15.7	37.6	0.3	419.8	19.2	11.3	2
Eastern	14.8	51.2	0.6		22.2	10.9	3
Kwun Tong	32.2	20.6	1.2		23.4	11.4	2
Sham Shui Po	31.1	26.1	3.5		21.6	10.3	2
Kwai Chung	52.4	11	8.2		24.5	11	2
Tsuen Wan	42.3	35.7	7.2	270.7	22	11.3	3
Tseung Kwan O	19.2	31.1	1.8	152.2	17.1	9.5	2
Yuen Long	23.5	28.3	1.5	562.1	17.7	9.4	2
Tuen Mun	34.4	21.2	4.4	659.4	27	15.1	2
Tung Chung	9.4	34.7	0.7	413.8	13.4	5.9	2
Tai Po	25.9	31.4	3.2		23.7	15.4	2
Sha Tin	8.3	41.9	1.5		18.8	9.1	2
North	14.1	42	1.4	193.6	21.1	13.1	2
Tap Mun	13.9	50.4	1.4	342.3	0	0	2

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
Roadside Stations
	Pollutant Concentrations(μg/m³)
Causeway Bay	54.8	16	5.1	489.5	35.2	20.5	3
Central	44.1	11.8	3.4	547.2	24.4	11.7	2
Mong Kok	49.8	14.5	3.2	195.6	24.3	12.8	2

Remarks:

(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m³).

(3) Abbreviation:
NO₂ - nitrogen dioxide, O₃ - ozone,
SO₂ - sulphur dioxide, CO - carbon monoxide,
PM₁₀ - respirable suspended particulates,
PM_2.5 - fine suspended particulates

(4) The Pollutant concentration and AQHI information are based on real time data taken directly from EPD's Air Quality Monitoring Network.

(5) In case of equipment or station suspension due to repair and maintenance, the data collection for calculation of AQHI at station will be affected, the data of similar stations will then be adopted. Such AQHI will be shown with an asterisk.