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: 2021-06-17 12:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western20.7/1055.8/246/3/-18.2/167.6/31331
Kwun Tong64.3/3218.5/75.9/3/-31/2813.1/53353
Tai Po-/--/--/-/--/--/-3-*
Tung Chung9.1/446.8/204.7/2108.9/113.8/126.9/28228
Eastern24/1259.9/251/0/-27.9/258.6/35335
Sha Tin11.6/563.2/274/2/-16.4/157.3/30330
Tseung Kwan O18.3/953.3/231.8/0369.4/317.5/165.4/22323
Tap Mun9/464.3/276/3354.6/319.7/1811.3/47347
Yuen Long17.2/857.4/247.9/4444.8/4-/--/-3-*
Tuen Mun21.5/1045.1/192.9/1-/-30.3/2811/45345
Kwai Chung43/2135.3/157.3/3/-20.6/1910/41341
Sham Shui Po21.9/1063.3/278/4/-31.2/2813.7/54354
Tsuen Wan36/1841.3/174.3/2718.3/720.7/1910.5/43343
Causeway Bay82.8/4115.9/65.7/3619.3/681.2/6322.4/72372
Central68.6/3418.1/74.6/2506.7/524.2/2211.5/47347
Mong Kok75.8/3815.9/61.2/0857.4/822.9/2112.3/51351

* 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