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: 2019-01-18 20:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
Kwun Tong70.7/3528.8/123.2/1/-51.1/4727.7/83483
Tai Po79.6/3933.1/143.2/1/-56/5137/1044104
Tung Chung97.4/4816.6/712.1/6997.9/968.5/5744.6/1235123
Sha Tin66.1/3340.8/176/3/-49/4529.4/87487
Tseung Kwan O40.6/2068.4/295.3/2971.8/944.1/4028.9/86486
Tap Mun30.3/1569/294/21033.5/1060.7/5327.9/84484
Yuen Long90.9/4526.9/117.4/41235.4/1269.1/5733.5/96596
Tuen Mun79.8/4027.1/112.2/11071.3/1082.8/6445/1245124
Kwai Chung91.8/4622.6/96.9/3/-45.8/4228.6/85485
Sham Shui Po91.1/4524.7/102.3/1/-46.6/4330.6/89489
Tsuen Wan89.5/4427.5/117.5/41236.2/1240.3/3729.8/88488
Causeway Bay100.7/5014.5/64.7/21064.7/1084.7/6550.4/1375137
Mong Kok122.5/629.5/43.5/11251/1248/4433.7/96596

* 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