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: 2017-04-26 22:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
Kwun Tong54.9/2721.5/94.3/2/-69/5758/1524152
Tai Po54.5/2738.7/162.8/1/-60.4/5346.5/1284128
Tung Chung52.4/2613.4/512.2/6648.4/628.9/2618/63363
Sha Tin43.1/2140.5/176.6/3/-54.9/5041.8/1164116
Tseung Kwan O33.1/1666.7/2810.7/51062.8/1066.6/5653.1/1444144
Tap Mun8/451.1/2210.1/5481/471.5/5945.6/1253125
Yuen Long61.6/301.8/010.7/5985.6/952.2/4826.4/81381
Tuen Mun75/373.2/116/81140/1153/4943.7/1213121
Kwai Chung91.2/452.2/011.4/6/-62.4/5449.8/1364136
Sham Shui Po97.4/481.2/06.8/3/-75.1/6058/1524152
Tsuen Wan87.8/441.3/012.5/61282.1/1270.2/5852.7/1434143
Causeway Bay107.6/540.3/010.1/51436.1/14-/--/-5-*
Mong Kok111.3/560.7/03.8/21361.9/1386.6/6673.2/1605160

* 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