Welcome to Environmental Protection Department Air Quality Health Index Website


AQHI Monthly Query
November 2021 (1.11-30.11)
Station Distribution of Hourly AQHI (Number of Hours)
LowModerateHighVery HighSerious
Central/Western142574400
Southern201519000
Eastern150570000
Kwun Tong151569000
Sham Shui Po193527000
Kwai Chung248467500
Tsuen Wan288421830
Tseung Kwan O186534000
Yuen Long25942920120
Tuen Mun16550925210
Tung Chung36632218140
Tai Po317403000
Sha Tin287433000
North279433440
Tap Mun266450000
Legend of CategoriesNumber of HoursPercent
Low349832%
Moderate716066%
High841%
Very High541%
Serious00%
Station Distribution of Hourly AQHI (Number of Hours)
LowModerateHighVery HighSerious
Causeway Bay154566000
Central152566200
Mong Kok137580300
Legend of CategoriesNumber of HoursPercent
Low44321%
Moderate171279%
High50%
Very High00%
Serious00%
Remarks:

(1) The total number of hourly AQHI readings at a station may be less than the total number of hours in the month because sometimes measurement may have to be suspended due to maintenance work at that station.

Last revision date: 08:07 02-12-2021