Delhi's air quality declined once again, falling into the ‘poor’ category with an Air Quality Index (AQI) of 209, said the ...

AQI remains moderate at 161 at 6 am on Monday. Fresh western disturbance to show impact starting from February 24th.

many countries have adopted an air quality index or AQI — a numerical scale where larger numbers mean worse air. They are also often assigned different colors to show whether the air is clean or ...

(This is reflected in the Air Quality Index, or AQI.) SCAQMD says much of the Los Angeles basin’s air is unhealthy for sensitive people. And the closer you get to the fires, the worse it gets.

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Get more information on air pollutants and the impact of poor air quality on your health. Learn about the causes of poor indoor air quality, how to detect it and how to improve it.

The City of London Corporation has long been at the forefront of tackling air pollution. We have been measuring air quality for over 60 years and in 1954, following the infamous London Smogs, we ...