• Current AQHI [09:00 2021-09-29]
    General Stations: 3 to 4 ( Low to Moderate)
    Roadside Stations: 4 ( Moderate)
  • Forecast of Health Risk Maximums [09:00 2021-09-29]
    <Today A.M.> General Stations: High Roadside Stations: High
    <Today P.M.> General Stations:Very High Roadside Stations:Very High


  • AQHI Forecast Alert [09:00 2021-09-29]

    The weather in Hong Kong will be mainly fine and very hot with light winds in the next few days (28-30 Sep). The intense sunshine enhances photochemical smog activity and the rapid formation of ozone and fine particulates in the Pearl River Delta region. Light winds also hinders effective dispersion of air pollutants. The air pollution levels are expected to remain higher this week (28 Sep - 02 Oct). (Issued on 27 Sep PM)

  • Current AQHI [09:00 2021-09-29]
    General Stations: 3 to 4 ( Low to Moderate)
    Roadside Stations: 4 ( Moderate)
Central/Western
Central/Western AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO267.7PM2.523.0
SO26.8PM1031.7
O378.0
Kwai Chung
Kwai Chung AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO282.6PM2.527.0
SO25.5PM1036.9
O352.0
Sham Shui Po
Sham Shui Po AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2109.8PM2.521.4
SO212.4PM1027.5
O318.9
Tai Po
Tai Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO248.8PM2.528.4
SO24.6PM1038.5
O369.1
Tap Mun
Tap Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO28.3PM2.522.2
SO26.9PM1026.9
O381.0
Tsuen Wan
Tsuen Wan AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO256.8PM2.531.8
SO27.1PM1039.6
O365.2
Tung Chung
Tung Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO242.5PM2.524.7
SO27.2PM1030.5
O361.4
Yuen Long
Yuen Long AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO254.3PM2.531.5
SO210.7PM1043.5
O366.9
Causeway Bay
Causeway Bay AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2142.2PM2.533.6
SO211.7PM1048.6
O37.6
Central
Central AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2142.4PM2.524.8
SO211.0PM1035.6
O36.5
Sha Tin
Sha Tin AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO242.1PM2.526.2
SO28.8PM1035.4
O354.7
Kwun Tong
Kwun Tong AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2104.4PM2.523.4
SO27.2PM1038.4
O330.5
Tseung Kwan O
Tseung Kwan O AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO250.5PM2.521.0
SO23.6PM1027.6
O360.9
Eastern
Eastern AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO256.1PM2.524.5
SO21.9PM1032.1
O367.9
Mong Kok
Mong Kok AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2137.8PM2.528.2
SO210.2PM1040.5
O38.1
Tuen Mun
Tuen Mun AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO268.2PM2.522.1
SO26.2PM1040.1
O341.4
Southern
Southern AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO277.7PM2.513.7
SO29.5PM1033.8
O348.2
North
North AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO249.5PM2.525.0
SO24.2PM1028.9
O376.1
General Station
Roadside Station
Suspended
Remarks:

(1) Time shown is in Hong Kong time.

(2) The AQHI information is based on real time data taken directly from EPD's Air Quality Monitoring Network.

(3) The hourly reported AQHI is for short term health risk communication; for health risks of long-term exposure of the air quality, please refer to the Annual Air Quality Index(Annual AQI).

(4) In case of station or equipment suspension due to maintenance, the data collection for calculation of AQHI at station will be affected, the data of most similar stations will then be adopted. Such AQHI will be shown in italics.  

FORECAST of Health Risk
29-09-2021
Today A.M.
Today P.M.
General StationsModerate to HighModerate to Very High
Roadside StationsModerate to HighModerate to Very High
低(LOW)[1-3] 中(MODERATE)[4-6] 高(HIGH)[7] 甚高(VERY HIGH)[8-10] 嚴重(SERIOUS)[10+]
Air Quality Health Index
09:00 29-09-2021AQHIHealth Risk
General StationsCentral/Western4Link to past 24 hrs AQHI trendModerate
Southern3Link to past 24 hrs AQHI trendLow
Eastern4Link to past 24 hrs AQHI trendModerate
Kwun Tong4Link to past 24 hrs AQHI trendModerate
Sham Shui Po4Link to past 24 hrs AQHI trendModerate
Kwai Chung4Link to past 24 hrs AQHI trendModerate
Tsuen Wan4Link to past 24 hrs AQHI trendModerate
Tseung Kwan O3Link to past 24 hrs AQHI trendLow
Yuen Long4Link to past 24 hrs AQHI trendModerate
Tuen Mun4Link to past 24 hrs AQHI trendModerate
Tung Chung3Link to past 24 hrs AQHI trendLow
Tai Po3Link to past 24 hrs AQHI trendLow
Sha Tin3Link to past 24 hrs AQHI trendLow
North3Link to past 24 hrs AQHI trendLow
Tap Mun3Link to past 24 hrs AQHI trendLow
Roadside StationsCauseway Bay4Link to past 24 hrs AQHI trendModerate
Central4Link to past 24 hrs AQHI trendModerate
Mong Kok4Link to past 24 hrs AQHI trendModerate
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Last revision date: 09:07 29-09-2021