EPD - Pollutant and AQHI Distribution

Pollutant and AQHI Distribution

(At 2024-04-26 05:00)

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
General Stations
	Pollutant Concentrations(μg/m³)
Central/Western	12.6	41.3	1.4		10.6	3.3	2
Southern	10.1	44.9	0.1	437.3	18.9	6.3	2
Eastern	18.3	78	0.8		19.5	6.1	4
Kwun Tong	22.9	43.7	0.4		16.5	5.6	3
Sham Shui Po	24.6	44.3	2.5		21.1	10.2	3
Kwai Chung	23.5	26.9	1.6		14.9	6.6	2
Tsuen Wan	15.8	54.4	5.9	345.5	10	4.1	3
Tseung Kwan O	24.2	48.5	2.5	358.3	19.9	8.6	3
Yuen Long	10.2	38.1	1.1	511.4	12.2	7.8	2
Tuen Mun	13.8	32.1	3.6	618.4	21.9	10.3	2
Tung Chung	8.2	29.5	1	410.5	12.3	9.8	2
Tai Po	11.4	62.9	2.7		15.9	5.8	3
Sha Tin	9.6	47.5	1.3		11.9	5.5	2
North	8.6	53.8	2.9	338.1	13	9.5	3
Tap Mun	4.4	85.4	1.1	426.9	9.7	1.9	3

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
Roadside Stations
	Pollutant Concentrations(μg/m³)
Causeway Bay	-	21.5	-	-	20.8	9	3
Central	31.3	44.6	2	379	23.1	11.6	3
Mong Kok	39.5	37	1.8	448.7	25.5	12.4	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.