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Air quality index of 2,553 and PM2.5 concentration of 947 μg per cubic metre reached in Multan on 8 November. The 2024 India–Pakistan smog is a severe record-breaking air pollution event that affected Eastern and Northern Pakistan and North India in November 2024, primarily in the Pakistani city of Lahore and Indian city of Delhi .
Although pollution is at its worst from November to February, Delhi's air misses clean-air standards by a wide margin for much of the year. On the worst days, the air quality index, a benchmark ranging from zero (good) to 500 (hazardous), exceeds 400. [37] Thermal power plants in NCR. [11]
Air Quality Index (AQI) is a number used to communicate the level of pollution in the air and it essentially tells you the level of pollution in the air in a given city on a given day. The AQI of Delhi was placed under the "severe-plus category" when it touched 574, by the System of Air Quality and Weather Forecasting And Research. [49]
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Environmental problems in Delhi, India, are a threat to the well-being of the city's and area's inhabitants as well as the flora and fauna. Delhi, the ninth-most populated metropolis in the world (second largest if the entire NCR includes especially Faridabad and Gurugram– Haryana, is one of the most heavily polluted cities in India, [1] having for instance one of the country's highest ...
While an AQI of 50 from day 1 to 182 and AQI of 100 from day 183 to 365 does provide an annual average of 75, it does not mean the pollution is acceptable even if the benchmark of 100 is deemed safe. Because the benchmark is a 24-hour target, and the annual average must match the annual target, it is entirely possible to have safe air every day ...
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.
The following list of countries by air pollution sorts the countries of the world according to their average measured concentration of particulate matter in micrograms per cubic meter (μg/m 3).