Primary Pollutant


Hong Kong aqi air quality index status boy

Major Air Pollutants in Hong Kong

live rank icon
Hong Kong co carbon monoxide icon
180 (CO)
Hong Kong no2 nitrogen dioxide icon
15 (NO2)

PM2.5 1X

The current PM2.5 concentration in Hong Kong is 1 times above the recommended limit given by the WHO 24 hrs air quality guidelines value.

Hong Kong - States Air Pollution Level

STATES Status AQI AQI-US AQI-IN PM2.5 PM10 Temp Humid
MODERATE 56 56 32 15 30 23 83

Hong Kong - Metro Cities AQI

5˚C / 48%
10˚C / 87%
25˚C / 36%
16˚C / 100%

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 & 1 month

FAQs of Hong Kong's Air Quality Index

(Frequently Asked Questions)

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

The real-time air quality in Hong Kong is 32 MODERATE AQI now. This was last updated 1 hour ago .

The current concentration of PM2.5 in Hong Kong is 15 (µg/m³). The World Health Organisation (WHO) recommends 15 µg/m³ as the threshold concentration of PM2.5 for 24 hrs mean. Currently, the concentration is 0.60 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 city.

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 in your city and nearby locations. Real-time AQI, map, weather & fire data, health advice with insightful & analytical dashboards.

Hong Kong aqi air quality mobile app
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