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: 2019-12-09 03:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
Kwun Tong70/3535.2/154.2/2/-50/4619/65465
Tai Po60.5/3019/84.2/2/-27.8/2522/71371
Tung Chung21.9/1055.2/232.8/1265.3/219/1712.8/52352
Sha Tin49.8/2436.9/158/4/-30.2/2720.7/69369
Tseung Kwan O48.1/2447.3/201.5/0652.1/628.6/2619.2/65465
Tap Mun14/766.3/286.4/3498.5/424.3/2215.6/58358
Yuen Long55.4/2720.6/87.3/3753.4/743.5/4019.4/66466
Tuen Mun67.6/3332.3/134.3/2473.7/439.8/3625.8/79479
Kwai Chung30.9/1579.4/345/2/-28.4/2617.8/62462
Sham Shui Po55.1/2757.8/2412.3/6/-34.3/3119.4/66466
Tsuen Wan30.2/1550.9/211.5/0809/828.2/2620.1/67367
Causeway Bay86.8/4315.6/63.5/1646.4/635.3/3223.5/74474
Mong Kok76.2/3834/142.8/1719.4/732.8/3021.5/70470

* 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