World's Air Pollution: Real-time Air Quality Index
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Air Quality Scale
Good
Moderate
Unhealthy
for sensitive groups
Unhealthy
Very
Unhealthy
Hazardous
The website is brought to you by the World Air Quality Index project

WAQI.info: World Air Quality Index
The above map shows the real-time air quality for more than 10,000 stations in the world.
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About the World Air Quality Index project

How to use this web application

To get more information about a specific city, move your move over any of the the flags in the above map, then click to get the full air pollution historical data.

GoodUnhealthy
Moderate
Very
Unhealthy
Unhealthy
for sensitive groups
Hazardous

Further information and links

Want to know more Air Pollution?
Check our Frequently Asked Question (FAQ) page.


Want to see the Air Pollution Forecast?
Check our Forecast page.


Want to know more about the project and team?
Check the Contact page.


Want to access the Air Quality data via programatic API?
Check the API page.


Want to host an Air Quality monitoring station?
Check the Monitoring Stations page.


We need your help to translate this site.


Credits

All the credits must go to the worlwide EPA (Enviromental Protection Agencies), as all this work is only made possible thanks to their work. Check the full worldwide EPA list page.

Some of the icons made by Freepik from www.flaticon.com is licensed by CC 3.0 BY. Map by leaflet.


Air Quality Index (AQI) Calculation

The Air Quality Index is based on measurement of particulate matter (PM2.5 and PM10), Ozone (O3), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2) and Carbon Monoxide (CO) emissions. Most of the stations on the map are monitoring both PM2.5 and PM10 data, but there are few exceptions where only PM10 is available.

All measurements are based on hourly readings: For instance, an AQI reported at 8AM means that the measurement was done from 7AM to 8AM.

Air Quality Scale

The AQI scale used for indexing the real-time pollution in the above map is based on the latest US EPA standard, using the Instant Cast reporting formula.

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50 Good Air quality is considered satisfactory, and air pollution poses little or no risk None
51 -100 Moderate Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150 Unhealthy for Sensitive Groups Members of sensitive groups may experience health effects. The general public is not likely to be affected. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200 Unhealthy Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300 Very Unhealthy Health warnings of emergency conditions. The entire population is more likely to be affected. Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+ Hazardous Health alert: everyone may experience more serious health effects Everyone should avoid all outdoor exertion

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Usage Notice
All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.





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