World's Air Pollution : Real-time Air Quality Index
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The website is brought to you by the
The World Air Quality Index (WAQI) project
The above map shows the real-time air quality for more than 10,000 stations in the world.
Can not find your city on the map?

Still no air quality monitoring available for your area?
Participate in this project by hosting your own air quality monitoring station.


How to use this web site

To get more information about a specific city, click on any of the the flags (AQI indicators) in the above map, then on the arrow icon to get the full pollution historical data.

for sensitive groups

Further information and links

Want to know more Air Pollution?
Check our Frequently Asked Question 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.


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 is licensed by CC 3.0 BY

Air Quality Index 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.

Health Implications
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no risk
51 - 100ModerateAir 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.
101- 150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.
151- 200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effects
201- 300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.
300+HazardousHealth alert: everyone may experience more serious health effects

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.