Air Pollution in the World
Real-time Air Quality Index (AQI)
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The above map shows the current and real-time air quality in the world. Data is updated every minute.
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The World Air Quality Index (AQI) project




Air Quality Scale

The traditonal 0-500 AQI scale, based on the US EPA standard, is used for indexing the pollution.

AQIPollution
Level
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

Air Quality Index Calculation

The Air Quality Indexes are based on PM2.5, PM10, Ozone, NO2, SO2 and CO hourly measurements. (There are few exceptions where PM2.5 is not available - but only PM10).

To get more information about a specific city, you can click on the AQI indicators (see below), then on the arrow icon () to get the full pollution historic data.



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 World Air Quality Forecast page.

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

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