Primary Pollutant


Hong Kong aqi air quality index status boy

Major Air Pollutants in Hong Kong

live rank icon
Hong Kong pm2.5 icon
11 (PM2.5)
Hong Kong pm 10 icon
26 (PM10)
Hong Kong so2 sulphur dioxide icon
1 (SO2)
Hong Kong o3 ozone icon
12 (Ozone)
Hong Kong no2 nitrogen dioxide icon
12 (NO2)


The current PM2.5 concentration in Hong Kong is ✓below the recommended limit given by the WHO 24hrs air quality guidelines value.

Hong Kong - States Air Pollution Level

STATES Status AQI AQI-US AQI-IN PM2.5 PM10 Temp Humid
GOOD 44 44 25 11 26 28 89

Hong Kong - Metro Cities AQI

19˚C / 52%
22˚C / 41%
6˚C / 88%
18˚C / 30%
37˚C / 40%

Historic Air Quality Graph of Hong Kong


Oct 1, 2020


Oct 1, 2020


Explore an insightful air pollution data for last 24 hrs & 7 days

FAQs of Hong Kong's Air Quality

(Frequently Asked Questions)

Some facts about air pollution level in Hong Kong and what quality of air you breathe in your region.

The current Air Quality Index (AQI) in Hong Kong is 25 GOOD air quality. This reading was last taken 50 minutes ago .

The current concentration of PM2.5 in Hong Kong is 11 (µg/m³). The World Health Organisation (WHO) recommends 15 µg/m³ 24 hrs as the threshold concentration of PM2.5. Currently, the concentration is 0.44 times the recommended limit.

Generally, the air quality at Hong Kong starts deteriorating in late October. The winters are the worst-hit season in terms of air pollution.

You should wear a good N95 mask when you go outdoor in Hong Kong until the AQI is improving upto moderate range.

Office going people should avoid personal vehicles and use public transportations or carpooling.

(i) The primary causes of outdoor air pollution are solid, liquid particles called aerosols & gase from vehicles emissions, construction activities, factories, burning stubble & fossil fuels and wildfire, etc.

(ii) Main causes of indoor air pollution are harmful gases from cooking fuels (such as wood, crop wastes, charcoal, coal and dung), damp, mould smoke, chemicals from cleaning materials, etc.

Indoor air pollution in Hong Kong is as dangerous as outdoor pollution, because the air pollutants come inside the houses or buildings through doors, windows and ventilation.

In Hong Kong, you must use an air purifier or fresh air machine at home or office indoor and close all the doors, windows and ventilations when the outdoor air quality index (aqi) in Hong Kong is very high. Proper ventilation is highly recommended only when outdoor air quality is improving and moderate AQI range.

World's Most Polluted Cities & Countries AQI Ranking

Real-time top most polluted cities and monthly & annual historic AQI ranking of cities & countries

Air Quality Solutions for Hong Kong

Find out Prana Air's air quality monitors & solutions to fight air pollution in your country.

prana air fresh air machine for Hong Kong

Keep a track of Hong Kong air pollution
level on “AQI Air Quality App

Know what you breathe and the quality of air nearby locations. Real-time AQI, map, weather & fire data, health advice with insightful dasbboards.

Hong Kong aqi air quality mobile app