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: 2024-04-23 12:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western29.2/1439.1/162.9/1/-17/1511.1/46346
Kwun Tong64.6/3213.8/50.3/0/-17.5/1613/52352
Tai Po47.6/2321.9/92.8/1/-4.5/43/12223
Tung Chung24.4/1240.8/170.6/0447.4/413.6/1210.2/42242
Eastern68.1/3423.3/100.2/0/-13.5/1210.2/42342
Sha Tin59.7/2925.8/111.6/0/-11.8/108.1/33333
Tseung Kwan O24.6/1270.4/302.2/1257.3/214.8/13-/-3-*
Tap Mun2.9/186.8/371.1/0313.1/35.9/53.5/14337
Yuen Long59/2913.2/51.2/0682.2/611.1/108.8/36336
Tuen Mun54.8/2714.3/63.9/2707.8/722/2013/52352
Kwai Chung-/--/--/-/-15.8/148.7/36336
Sham Shui Po73.3/367.3/32.5/1/-16.3/1511.5/47347
Tsuen Wan65.9/3327.1/116.6/3521.9/514.5/1310.3/42342
Causeway Bay69.2/3418.7/84.7/2625.6/629.9/2721.8/71371
Central63.6/3113.1/54.4/2766.4/722.1/2015.3/57357
Mong Kok94/475.5/24.5/2791.3/721.5/1916.1/593*59

* 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