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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.
This list contains the top 500 cities by PM2.5 annual mean concentration measurement as documented by the World Health Organization covering the period from 2010 to 2022. 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.
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.
Of the 30 most polluted cities in the world, 21 were in India in 2019. [ 2 ] [ 3 ] As per a study based on 2016 data, at least 140 million people in India breathe air that is 10 times or more over the WHO safe limit [ 4 ] and 13 of the world's 20 cities with the highest annual levels of air pollution are in India. [ 5 ]
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 ...
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 ...
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]
Rank City Particulate matter up to 10 micrometers (PM10) Particulate matter up to 2.5 micrometers (PM2.5) 1 [thrissur]] 23 10 [9] 2 Kollam: 39 17 3 Alappuzha: 46 20 4 Trivandrum: 52 23 5 Kottayam: 55 24 6 Kozhikode: 57 25 7 Kochi: 64 28 8 Thrissur: 73 32