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: 2019-09-17 11:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
Kwun Tong29.9/14107.4/465.2/2/-52.9/4823/73573
Tai Po31.6/15118.1/517.1/3/-35.1/3222.9/73573
Tung Chung49.1/2467.7/293.5/1558.4/531.8/2920.6/68468
Sha Tin24.4/12119.4/534.1/2/-26.3/2421.4/70570
Tseung Kwan O9.8/4131.6/742.8/1462.3/434.1/3119.4/66574
Tap Mun6.9/3140.8/895.2/2647.7/645.1/4125.3/78589
Yuen Long27.6/13102.9/443.7/2553.8/550.9/4722.2/72472
Tuen Mun44.9/2288.2/381.7/01061.1/1047/4325.1/78478
Kwai Chung45.8/2291/396.4/3/-30.8/2821.2/70470
Sham Shui Po51.7/2587.5/375.1/2/-40.9/3722.7/73573
Tsuen Wan21.5/10102.9/446.6/3478.4/431.1/2819.7/66466
Causeway Bay107.3/5434.5/143.6/1992.6/958.8/5232.7/94594
Mong Kok94.8/4754.3/231.6/0857/845.5/4229.2/86586

* 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
8-10Very high