EPD - Pollutant and AQHI Distribution

Pollutant and AQHI Distribution

(At 2024-04-19 17:00)

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
General Stations
	Pollutant Concentrations(μg/m³)
Central/Western	15.7	52.9	1.9		16.6	9.1	3
Southern	15.4	54	1.1	455.6	19.3	10	3
Eastern	30.6	56	0.6		17.9	11.3	3
Kwun Tong	41.5	35.1	1		23.7	13.4	3
Sham Shui Po	39.7	30.7	2.1		22.9	14.7	3
Kwai Chung	55.4	20.1	2.1		19.7	11.8	3
Tsuen Wan	54.8	40.1	7.5	327.7	18.9	13.2	3
Tseung Kwan O	25.1	55.3	0.5	143.5	22.3	11.6	3
Yuen Long	31.3	39.8	2.4	521.9	12.9	7	3
Tuen Mun	34	37.1	3.8	596.6	22.1	16.9	3
Tung Chung	8	56.9	1.5	409.1	15.7	10.8	2
Tai Po	33.5	37.6	3.1		19	12.3	3
Sha Tin	21.5	51.3	1.4		20.8	13.6	3
North	27.8	41.5	2.6	278	19	10.9	3
Tap Mun	0.3	64.5	0.9	246.4	12.2	8.7	2

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
Roadside Stations
	Pollutant Concentrations(μg/m³)
Causeway Bay	40.1	38.4	3.3	400.1	31.2	19.1	3
Central	65.2	14	3.9	405.2	26.2	14.8	3
Mong Kok	73.5	11.6	4.1	491.9	24	16	3

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.