HIGHLIGHTS
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Current AQHI: General Stations 3 to 4Roadside Stations 4 to 5
Forecast of Health Risk Maximums:
General Stations: Moderate
Roadside Stations: Moderate
Central/Western
Central/Western AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 30.6 PM2.5 17.5
SO2 18.8 PM10 33.4
O3 52.2
Kwai Chung
Kwai Chung AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 79.1 PM2.5 20.6
SO2 38.2 PM10 34.4
O3 25.7
Sham Shui Po
Sham Shui Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 35.3 PM2.5 9.9
SO2 6.7 PM10 30.2
O3 49.5
Tai Po
Tai Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 - PM2.5 13.8
SO2 - PM10 28.8
O3 -
Tap Mun
Tap Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 7.9 PM2.5 10.1
SO2 4.7 PM10 30.7
O3 79.0
Tsuen Wan
Tsuen Wan AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 61.9 PM2.5 19.8
SO2 14.3 PM10 39.4
O3 28.6
Tung Chung
Tung Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 10.2 PM2.5 11.7
SO2 3.3 PM10 26.5
O3 55.5
Yuen Long
Yuen Long AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 25.1 PM2.5 18.7
SO2 6.2 PM10 35.7
O3 56.1
Causeway Bay
Causeway Bay AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 131.5 PM2.5 31.0
SO2 9.4 PM10 56.2
O3 6.9
Central
Central AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 66.7 PM2.5 7.7
SO2 7.9 PM10 25.2
O3 27.7
Sha Tin
Sha Tin AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 15.5 PM2.5 -
SO2 3.8 PM10 -
O3 67.0
Kwun Tong
Kwun Tong AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 106.5 PM2.5 19.6
SO2 9.7 PM10 42.4
O3 13.2
Eastern
Eastern AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 37.5 PM2.5 9.1
SO2 2.1 PM10 25.6
O3 49.4
Mong Kok
Mong Kok AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 98.4 PM2.5 17.9
SO2 4.5 PM10 34.3
O3 13.1
Tuen Mun
Tuen Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 - PM2.5 20.9
SO2 - PM10 33.9
O3 -
General Station
Roadside Station
Remark:

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

(2) 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 Annual Air Quality Index (Annual AQI).

(3) 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 a most similar station will then be adopted. Such AQHI will be shown in italics.

(4) Owing to equipment problem, the reporting of  RSP and FSP concentrations at the Sha Tin general station is suspended temporarily. We apologise for the inconvenience caused.

FORECAST of Health Risk
29-05-2015
Today P.M.
Tomorrow A.M.
General Stations Low to Moderate Low to Moderate
Roadside Stations Low to Moderate Low to Moderate
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
13:00 29-05-2015 AQHI Health Risk
General Stations Central/Western 3Link to past 24 hrs AQHI trend Low
Eastern 3Link to past 24 hrs AQHI trend Low
Kwun Tong 4Link to past 24 hrs AQHI trend Moderate
Sham Shui Po 3Link to past 24 hrs AQHI trend Low
Kwai Chung 4Link to past 24 hrs AQHI trend Moderate
Tsuen Wan 3Link to past 24 hrs AQHI trend Low
Yuen Long 3Link to past 24 hrs AQHI trend Low
Tuen Mun 3Link to past 24 hrs AQHI trend Low
Tung Chung 3Link to past 24 hrs AQHI trend Low
Tai Po 3Link to past 24 hrs AQHI trend Low
Sha Tin 3Link to past 24 hrs AQHI trend Low
Tap Mun 3Link to past 24 hrs AQHI trend Low
Roadside Stations Causeway Bay 5Link to past 24 hrs AQHI trend Moderate
Central 4Link to past 24 hrs AQHI trend Moderate
Mong Kok 4Link to past 24 hrs AQHI trend Moderate
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Last revision date:13:08 29-05-2015