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: 2017-11-22 23:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western37.6/1825.8/116.2/3/-35.4/3219.2/65365
Kwun Tong35.8/1724.1/103.6/1/-35.1/3216.1/59359
Tai Po28.6/1436.8/151.7/0/-52/4822.4/72372
Tung Chung46.9/238.3/37.6/4808.5/849/4528.3/85385
Eastern36.2/1832.7/141.6/0/-37.1/3415.5/58358
Sha Tin26.5/1336.2/153.8/2/-27.6/256.3/26326
Tseung Kwan O18.4/943.6/186.1/3880.2/828/2512/50350
Tap Mun7.7/348.2/206.5/3763.5/732.2/2920.5/68368
Yuen Long34.2/1732.2/139.4/5500.8/456.8/5122.4/72372
Tuen Mun38.9/1918.3/78/4681.6/672.7/5932.9/94394
Kwai Chung32/1635/152/1/-30.3/2817.8/62362
Sham Shui Po27.6/1333.7/143.4/1/-43.4/4018.3/64364
Tsuen Wan39.4/1924.6/109.3/5620.6/629.5/2714.6/56356
Causeway Bay99.9/502.6/18.5/4925.4/952.7/4835.8/1014101
Central78.8/394.6/16.7/3868.2/831.3/2817.7/62362
Mong Kok58.1/2916.2/63/1713.2/738.2/3522.5/72372

* 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