Index of air quality in the world's major cities: December 22

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The Independent Travel

Daily air quality index of some of the world's major cities on December 22, using data from AirNow, CITEAIR, and the American Embassy in Beijing.



City

Average 22/12/2010

London (UK)

   Good                                                              
Madrid (Spain) NA

Paris (France)

Good

Brussels (Belgium)  

Moderate

Berlin (Germany )

Moderate

Prague (Czech Republic)

Moderate

Zurich (Switzerland)

Good

Beijing (China)  

NA

Beijing - US embassy stats

Moderate

Shanghai (China)  

Unhealthy for sensitive groups

Hong Kong (China)

Moderate

Brunei (Brunei)

Good

New York (USA)  

Good

San Francisco (USA)

Good

Mexico City (Mexico )

Unhealthy for sensitive groups

Montreal (Canada)

Good

Toronto (Canada)

Good

New Delhi (India)

Unhealthy

Sydney (Australia)

NA




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 22.

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

 

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