Daily air quality index of some of the world's major cities on December 23, using data from AirNow, CITEAIR, and the American Embassy in Beijing.



City

Average 22/12/2010 Average 23/12/2010

London (UK)

   Good                                                               Good
Madrid (Spain) Moderate  NA

Paris (France)

Good Good                                                       

Brussels (Belgium)  

Moderate
Good

Berlin (Germany )

Moderate
Moderate

Prague (Czech Republic)

Moderate
Good

Zurich (Switzerland)

Good Good

Beijing (China)  

NA NA

Beijing - US embassy stats

Moderate
Unhealthy for sensitive groups

Shanghai (China)  

Unhealthy for sensitive groups
Unhealthy

Hong Kong (China)

Moderate Moderate

Brunei (Brunei)

Good Good

New York (USA)  

Good NA

San Francisco (USA)

Good NA

Mexico City (Mexico )

Unhealthy for sensitive groups Unhealthy for sensitive groups

Montreal (Canada)

Good Good

Toronto (Canada)

Good Good

New Delhi (India)

Unhealthy Unhealthy for sensitive groups

Sydney (Australia)

NA Good




The Air Quality Index (AQI) or Air Pollution Index (API) measures the parts of pollutant in a specified volume of air. The lower the AQI the fewer particles of pollution are in the air. For a more detailed explanation see http://www.airnow.gov/index.cfm?action=aqibasics.aqi.

All results are color-coded following the American AQI standard shown below. For all countries outside of Europe, the US and Canada, that region's definition of AQI terms has been accepted.

Legend 

Air Quality

 

Good

 

Moderate

 

Unhealthy for sensitive groups

 

Unhealthy

 

Very Unhealthy

 

Hazardous

 

Data: Data relating to Europe, the US and Canada is taken from CITEAIR - Common Information to European Air ( http://www.airnow.gov / http://www.airqualitynow.eu); data concerning China is taken from both official Chinese government sources and the US Embassy's automated air index Twitter account. For all countries the data displayed falls within either that country's definition of the level of air quality or the international AQI index. Data for all European, US and Canadian cities refers to background, not roadside, levels of air quality.

All data was collected at 1:00pm GMT on December 23.

http://www.airqualitynow.eu
http://www.airnow.gov

 

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