EPD - Pollutant and AQHI Distribution

(At 2024-05-09 17:00)

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
General Stations
	Pollutant Concentrations(μg/m³)
Central/Western	41.7	156.3	3.1		45.5	22	7
Southern	23.9	168.9	2.1	718.8	40.6	23.6	7
Eastern	50.5	154.4	1.7		47.3	23.6	7
Kwun Tong	42.2	162	1.6		46.3	23.7	7
Sham Shui Po	57.2	144.6	2.8		50.1	26.3	7
Kwai Chung	38.9	159.8	2.1		45.2	25.7	7
Tsuen Wan	44.6	182.7	2.2	434.8	42.8	25.7	8
Tseung Kwan O	11.8	193.3	2.1	405.6	51.9	30.1	7
Yuen Long	30.1	173.9	2.6	658.5	38.4	22	7
Tuen Mun	30.7	165.2	4.1	698.5	52	22.4	7
Tung Chung	22.7	176.1	2.2	489.1	39	23.5	7
Tai Po	35.5	170	3.8		47.6	26.7	7
Sha Tin	15.9	189.1	2.1		45.3	25	7
North	26.8	177.7	1.7	410.3	37.9	26.9	6
Tap Mun	3.4	201	3.1	467.7	46.6	23.7	8

Station Names	NO₂	O₃	SO₂	CO	PM₁₀	PM_2.5	AQHI
Roadside Stations
	Pollutant Concentrations(μg/m³)
Causeway Bay	120.2	84	2	609.6	62.8	35.1	7
Central	107.5	100.7	2.8	454.1	54.1	31.9	7
Mong Kok	106.7	101.8	2.6	602.5	55.1	30.5	7

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.