HIGHLIGHTS
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Current AQHI: General Stations 4 to 6Roadside Stations 6
Forecast of Health Risk Maximums:
General Stations: Moderate
Roadside Stations: Moderate
Central/Western
Central/Western AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 64.8 PM2.5 30.2
SO2 11.5 PM10 49.3
O3 88.2
Kwai Chung
Kwai Chung AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 54.6 PM2.5 24.0
SO2 6.1 PM10 36.1
O3 90.3
Sham Shui Po
Sham Shui Po AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 92.5 PM2.5 29.2
SO2 9.6 PM10 50.2
O3 66.6
Tai Po
Tai Po AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 26.4 PM2.5 22.9
SO2 6.6 PM10 39.9
O3 128.0
Tap Mun
Tap Mun AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 6.6 PM2.5 19.7
SO2 6.7 PM10 36.7
O3 144.6
Tsuen Wan
Tsuen Wan AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 72.8 PM2.5 27.9
SO2 10.3 PM10 45.2
O3 75.1
Tung Chung
Tung Chung AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 101.6 PM2.5 26.7
SO2 8.9 PM10 45.1
O3 5.4
Yuen Long
Yuen Long AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 61.8 PM2.5 36.1
SO2 10.1 PM10 51.1
O3 64.1
Causeway Bay
Causeway Bay AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 128.3 PM2.5 48.0
SO2 8.6 PM10 74.5
O3 45.2
Central
Central AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 115.6 PM2.5 21.5
SO2 8.3 PM10 42.6
O3 49.6
Sha Tin
Sha Tin AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 21.2 PM2.5 24.1
SO2 6.5 PM10 41.8
O3 129.5
Kwun Tong
Kwun Tong AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 35.0 PM2.5 25.5
SO2 5.1 PM10 44.9
O3 112.5
Eastern
Eastern AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 55.9 PM2.5 21.7
SO2 7.3 PM10 41.4
O3 92.5
Mong Kok
Mong Kok AQHI 6
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 126.7 PM2.5 -
SO2 4.8 PM10 -
O3 37.3
Tuen Mun
Tuen Mun AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 94.8 PM2.5 28.0
SO2 20.5 PM10 62.9
O3 33.9
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 maintenance, the monitoring of PM10 and PM2.5 at Mong Kok roadside station has been temporarily suspended. We apologize for any inconvenience caused.

FORECAST of Health Risk
25-04-2015
Tomorrow A.M.
Tomorrow P.M.
General Stations Low to Moderate Moderate to High
Roadside Stations Moderate Moderate to 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
21:00 25-04-2015 AQHI Health Risk
General Stations Central/Western 5Link to past 24 hrs AQHI trend Moderate
Eastern 5Link to past 24 hrs AQHI trend Moderate
Kwun Tong 6Link to past 24 hrs AQHI trend Moderate
Sham Shui Po 6Link to past 24 hrs AQHI trend Moderate
Kwai Chung 5Link to past 24 hrs AQHI trend Moderate
Tsuen Wan 5Link to past 24 hrs AQHI trend Moderate
Yuen Long 5Link to past 24 hrs AQHI trend Moderate
Tuen Mun 5Link to past 24 hrs AQHI trend Moderate
Tung Chung 4Link to past 24 hrs AQHI trend Moderate
Tai Po 5Link to past 24 hrs AQHI trend Moderate
Sha Tin 5Link to past 24 hrs AQHI trend Moderate
Tap Mun 6Link to past 24 hrs AQHI trend Moderate
Roadside Stations Causeway Bay 6Link to past 24 hrs AQHI trend Moderate
Central 6Link to past 24 hrs AQHI trend Moderate
Mong Kok 6Link to past 24 hrs AQHI trend Moderate
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Last revision date:21:07 25-04-2015