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: 2021-10-24 16:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western27.6/13117/502.6/1/-17.3/1610.7/44450
Kwun Tong29.7/1498.6/423.8/2/-13.8/1210.9/45445
Tai Po30.5/1596.9/413.3/1/-23.3/2114.3/55455
Tung Chung28.1/14145.6/977.4/4496.3/450.3/4635.9/1016101
Eastern25.8/12102.7/441.2/0/-18/168.9/37444
Sha Tin16.5/8112.3/485.6/3/-15.7/147.3/30448
Tseung Kwan O11.2/5115.4/491.7/0501.9/418.1/169.1/37449
Tap Mun6.8/397.4/427.2/3841.2/817.4/1611.9/49449
Yuen Long39.9/2096.1/4110/5664.4/627.7/2513.9/54554
Tuen Mun30.4/15117/505/2731.9/743.8/4019/65665
Kwai Chung49.9/2584.1/362.2/1/-24.2/2215.1/57457
Sham Shui Po33.8/16108.4/463.6/1/-13.2/126.9/28546
Tsuen Wan42.2/2184.6/365/2609.3/621.4/1913.6/54454
Causeway Bay113.3/5722.8/94.8/2872.1/835.2/3221.1/69469
Central115.4/5834.2/142.7/11192.2/1124.7/2215.4/57458
Mong Kok60.9/3082.7/351.1/0678.3/621.6/2012.4/51451

* 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