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: 2019-10-17 02:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
Kwun Tong25.3/12106.6/465.9/3/-44.9/4119.4/66566
Tai Po61/3026.2/112.8/1/-28.3/2618.2/63463
Tung Chung22/1190.6/392.8/1537/526.9/2417.9/63463
Sha Tin37.2/1852.7/225/2/-22.3/2011.6/48348
Tseung Kwan O28.6/14101.1/433.6/1460.5/435/3213.4/53553
Tap Mun4.5/2125.2/636.7/3510.3/542/3817.6/62563
Yuen Long34.5/1769.7/304.5/2562.8/533.1/3017.4/62462
Tuen Mun31.3/1584.1/362.3/1652.4/634/3122/71471
Kwai Chung22.8/1196.1/416.7/3/-31.6/2917.7/62462
Sham Shui Po20.2/10104.9/456/3/-30.8/2815.6/58458
Tsuen Wan15.1/778/336.9/3314/336.9/3421.6/70470
Causeway Bay72.6/3659.4/251.8/0747.5/739.9/3620/67567
Mong Kok62.6/3170.8/302/1703.1/635.7/3319/65565

* 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