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The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries. Air quality in the database is represented by the annual mean concentration of particulate matter ( PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively).
The rating includes around 500 cities, covering 72 percent of the urban population in India. Until 2017, India was divided into five zones for the purpose of this survey and each city was scored on 19 indicators. The cities were classified into four colours: green, blue, black, and red, green being the cleanest city, and red the most polluted.
The average annual SOx and NOx emissions level and periodic violations in industrial areas of India were significantly and surprisingly lower than the emission and violations in residential areas of India; Of the four major Indian cities, air pollution was consistently worse in Delhi, every year over 5-year period (2004–2018).
India is a federal constitutional republic governed under a parliamentary system consisting of 28 states and 8 union territories. [1] All states, as well as the union territories of Jammu and Kashmir, Puducherry and the National Capital Territory of Delhi, have elected legislatures and governments, both patterned on the Westminster model. The ...
Click on the arrows next to the table's headers to have the most polluted cities ranked first. Please note that constraints exist in this type of lists. For instance, some places like Africa and South America lack air pollution reporting tools, so their pollution levels are probably not reflected in this list.
The list is compiled from the 2011 India Census Report published by Government of India. [2] [3] The rank is based on the percentage of households which have access to safe drinking water. Kerala ranked highest with 97.6%, while Andhra has the worst rank with only 33.5% households having access to safe drinking water. National average stands at ...
This burning has been found to be a leading cause of smog and haze problems through the winter over Punjab, cities such as Delhi, and major population centers along the rivers through West Bengal. [28] [29] [30] In other states of India, rice and wheat crop residue straw burning in open is a major source of air pollution. [31]
In the World Health Organization's (WHO) ranking of cities by air pollution, Kolkata ranks 25th among a total of 1100 cities. [4] Air pollution is high in Kolkata despite the city's relatively low rates of car ownership, compared to other large Indian cities, [5] and its strong public transport. It may be possible to reduce Kolkata's energy ...