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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. None of the cities was rated as green—the best category in the exercise.
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]
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.
Begusarai, a city of half a million people in northern India’s Bihar state, was the world’s most polluted city last year with an average annual PM2.5 concentration of 118.9 — 23 times the ...
10. Bagpat, India. Annual average PM2.5 concentration (μg/m³): 89.1. With PM2.5 concentration of 89.1, Bagpat just makes the top 10 most polluted cities in the world. 9. Peshawar, Pakistan.
Two Indian cities joined New Delhi to be among the world's worst 10 for pollution on Monday morning, with smoke heavy in the air a day after revellers let loose with firecrackers for Diwali - the ...
It has the air quality index of 106.2 in 2021 [7] [8] [9] and 228 in 2022. [10] It is also the most polluted city in India [11] whose pollution is more than air pollution in Delhi. [9] [12] The PM 2.5 of this city is twenty times more than the maximum level recommended by the World Health Organization. [13]
Scale reading for fine particulate matter crosses the 1,000 mark in Delhi for the first time this year