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Medical-grade filters for the IQAir HealthPro
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Medical-grade filters for the IQAir HealthPro

Live Air Quality

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

Mong Kok, HK

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Updated: 8:35 AM HKT
Moderate (4)
According to the:
Hong Kong Air Quality Health Index (AQHI) system
Moderate (53)
According to the:
United States Air Quality Index (AQI)1
Health advice from the US AQI at 8:00 AM HKT
Unusually sensitive people:
  • Consider reducing prolonged or heavy outdoor exertion.
  • Good day to be active outside
  • Students who are unusually sensitive to air pollution could have symptoms.*

Air pollution can make asthma symptoms worse and trigger attacks. Symptoms of asthma include coughing, wheezing, difficulty breathing, and chest tightness. Even students who do not have asthma could experience these symptoms.

If symptoms occur:
The student might need to take a break, do a less intense activity, stop all activity, go indoors, or use quick-relief medicine as prescribed. If symptoms don’t improve, get medical help.

Particulates (PM2.5 / PM10)
  • Respiratory symptoms possible in unusually sensitive individuals;
  • possible aggravation of heart or lung disease in people with cardiopulmonary disease and older adults
Live PM2.5 Levels
(Mong Kok 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.

Mong Kok 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
Mong Kok HK, 8:00 AM HKT
As of 8:00 AM HKT
(μg/m³)
Trend
PM2.5
13
 
PM10
29
 
O3
72
 
NO2
32
 
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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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: Sep 26, 2021, 8:35 AM GMT+8