Air Quality in Hong Kong


Since the Air Quality Health Index (AQHI) issued by Hong Kong Environmental Protection Department is not comparable to other regions in the world, Weather Underground of Hong Kong refers to the Air Quality Index (AQI) issued by U.S. Environmental Protection Agency and calculates the Air Quality Index based on air pollutant concentration data issued by Hong Kong Environmenal Protection Department.

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Time: 25 Nov 2024 05:00:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western7.3/384.6/363.0/1-/-23.3/218.4 /35436
Kwun Tong8.5/476.5/331.2/0-/-21.3/196.9 /28333
Tai Po10.4/580.1/341.8/0-/-24.3/2210.4 /43343
Tung Chung11.5/588.7/381.1/0362.8/322.0/2011.6 /48448
Eastern11.0/583.3/351.5/0-/-23.4/2111.0 /45445
Sha Tin6.9/384.2/361.5/0-/-20.5/188.2 /34436
Tseung Kwan O-/-82.8/351.1/0164.4/126.5/248.2 /34435
Tap Mun5.2/287.5/372.2/1356.7/327.1/2510.2 /42442
Yuen Long35.6/1710.6/41.4/0739.3/737.3/3432.4 /93293
Tuen Mun41.2/2011.0/45.5/3842.0/838.0/3536.9 /1042104
Kwai Chung11.9/575.2/32.5/0-/-22.2/2011.9 /49349
Sham Shui Po16.0/873.7/314.3/2-/-20.1/188.0 /33333
Tsuen Wan13.8/670.4/30.7/0420.8/418.9/177.7 /32332
Causeway Bay21.9/1063.7/271.1/0195.5/125.5/2311.3 /47347
Central15.3/774.0/311.4/0305.4/345.9/4211.8 /49449
Mong Kok35.7/1720.9/91.0/0389.5/323.1/2110.3 /42242

* Missing PM2.5 data from Environmental Protection Department

Air Quality Index (AQI)CategoryMeaning
0-50GoodAir pollution risk is low.
51-100ModerateAir quality is acceptable.
101-150Unhealthy for high-risk groupHigh-risk group may have health effects. General public is not affected.
151-200UnhealthyHigh-risk group may have more serious health effects. Some of the general public may have health effects.
201-300Very UnhealthyGeneral public have health effects.
301-500HazardousSome of the general public may have more serious health effects.

Air Quality Health Index (AQHI)Health Risk
1-3Low
4-6Moderate
7High
8-10Very high
10+Serious