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: 2019-03-23 09:00

StationPollutant Concentration (microgram/m3)/AQIAQHIAQI
NO2O3SO2COPM10PM2.5
Central/Western25.9/1250.8/214.5/2/-11.7/107.7/32332
Kwun Tong28.4/1446.1/192.9/1/-12/117/29329
Tai Po30.8/1548.7/211.5/0/-9.3/86.2/25325
Tung Chung15.4/757.6/241.4/0451.2/412.1/116.9/28328
Eastern37.8/1841.1/170.2/0/-12.1/111.8/7318
Sha Tin13.6/663.9/271.1/0/-6.7/62.6/10327
Tseung Kwan O12.8/662.2/265.2/2763.5/716.4/1510.1/42342
Tap Mun6.2/363.6/275.3/2447.2/412.2/116.1/25327
Yuen Long42.6/2140.4/172/1418.9/413.1/127/29329
Tuen Mun41.4/2034.5/143/1695.4/618.9/1713/52352
Kwai Chung47.6/2338.4/166.2/3/-13/129/37337
Sham Shui Po42.6/2132.3/132.7/1/-15.4/145.9/24324
Tsuen Wan43.8/2139/166/3772.5/78.3/76.1/25325
Causeway Bay50.7/2529.3/121/0463.4/419.5/1813.2/53353
Central53.7/2630.1/133.9/2655.5/615.1/139.4/39339
Mong Kok74/3715.7/61.6/0597.5/514.5/139.6/40340

* 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