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: 2022-05-18 01:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western11.8/5128.8/693.4/1/-22/209.8/40569
Kwun Tong21.9/10-/-1.8/0/-32.4/3012.9/52552
Tai Po17/8108.8/461.4/0/-20.7/1911.8/49449
Tung Chung10.2/5107.2/462.5/1175.4/120.6/1910.3/42446
Eastern19.8/9122.1/581.1/0/-31.3/289.6/40558
Sha Tin28.2/14-/-6.7/3/-22.9/2112.4/51451
Tseung Kwan O9/4126.3/651.1/0197.4/123.8/2211.3/47565
Tap Mun-/--/--/--/-28.3/2610/41541
Yuen Long24.2/12101.3/432.7/1582.2/521.6/2012.5/51451
Tuen Mun8.4/4-/-1.8/0494.4/431.6/2911/45545
Kwai Chung24.3/12-/-5.6/3/-23.2/2113.4/53553
Sham Shui Po37.1/18-/-4/2/-20.7/192.8/11519
Tsuen Wan43/2179.1/346.3/3468.1/425/2314.5/56456
Causeway Bay66.4/3373.6/312.7/1563.7/526.2/2410.2/42542
Central22.8/11111.9/481.1/0743.6/725/2312.6/52552
Mong Kok52.3/2658.8/251.9/1491.9/426.2/2411.3/47447

* 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