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IQAir HealthPro replacement filters
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IQAir HealthPro replacement filters

Live Air Quality

Up-to-date health advice and comparison with other major cities below. Updated hourly.

North, HK

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Updated: 8:35 AM HKT
Low (3)
According to the:
Hong Kong Air Quality Health Index (AQHI) system
Good (31)
According to the:
United States Air Quality Index (AQI)1
Health advice from the US AQI at 8:00 AM HKT
  • Air quality is satisfactory, and air pollution poses little or no risk.
  • Great day to be active outside!
  • None
Live PM2.5 Levels
(North HK, 8:00 AM HKT)

PM2.5 are tiny particles less than 2.5 millionths of a metre in size. They are so small that when you breath in, they can pass directly through your lungs into your blood, and then around your body to organs including the brain.

Past 24-hours PM2.5  
(μg/m³)

There is strong evidence linking PM2.5 pollution levels to heart disease, cancer, strokes, and COPD.

North PM2.5 vs. Major Cities
(μg/m³)

WHO PM2.5 limits are based on a 24-hour average level, which is what is shown above. The current HK (past 1-hour) level is also shown with a black line.

Individual Pollutant Levels
North HK, 8:00 AM HKT
As of 8:00 AM HKT
(μg/m³)
Trend
PM2.5
7
 
PM10
9
 
O3
56
 
NO2
25
 
SO2
2
 
Past 24-hours
(μg/m³)
View a different location
PM2.5 levels at 8:00 AM HKT (µg/m³)
www.embee.hk

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40
30
20
10
0
+

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Sources:
  • London: ERG, Imperial College London under the terms of the Open Government License.
  • Singapore: National Environment Agency via Data.gov.sg under the terms of the Singapore Open Data License
  • Sydney: NSW Planning Industry & Environment under terms of the CC BY 4.0 license
  • Hong Kong: Environmental Protection Department via data.gov.hk
  • New York: U.S. EPA public domain data via the AirNow API
Notes:
  • 1 To reflect current conditions, the AQI value is calculated using latest 1-hour readings for PM2.5 and PM10 particulates. This differs from the typical US AQ calculation which uses a 24-hour average. Read more here.
  • Heath advice and US AQI calculation is per the Technical Assistance Document for the Reporting of Daily Air Quality – the Air Quality Index (AQI) issued by the US EPA in September 2018.
  • Hong Kong AQHI calculation is per methodology published by the EPD, with missing data interpolated using last known good value.
Last updated: 2 Nov 2024, 08:35 GMT+8