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.

Reference Links:

Time: 2018-10-17 02:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western57.4/284.5/110.4/5/-29.5/2721.3/70370
Kwun Tong59.6/292.9/17.1/3/-17.2/1510/41241
Tai Po39.8/194.7/22.6/1/-32.5/3019.5/66266
Tung Chung-/--/--/--/-33.5/3121/69269
Eastern28.1/1428/120.9/0/-19.7/1811.9/49249
Sha Tin48/243.6/16.2/3/-24.8/2215.3/57257
Tseung Kwan O50.2/253.5/15.7/31035.5/1022.8/2111.3/47247
Tap Mun37.2/1811.3/49.9/5662.4/619.4/1711.3/47247
Yuen Long40.5/201.7/06.9/3956.4/935.5/3216.9/61261
Tuen Mun48/246.9/26.3/31197.9/1137.1/3416.2/59359
Kwai Chung36.2/1816.5/73.1/1/-18.8/1710.6/44244
Sham Shui Po54.4/276.3/22.7/1/-30.6/2814.4/55355
Tsuen Wan27.5/1318.2/76.7/3766.9/728/2521.4/70270
Causeway Bay60/302.1/07.9/41085.4/1029/2621.5/70370
Central71.8/360.7/012/61038.8/1026.4/2420.6/68368
Mong Kok59.9/303.4/12.1/1963.1/922.8/2116.9/61361

* 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