After the Diwali 2019, the air quality of Delhi and NCR region dropped to Hazardous level in several localities. Over the years, the pollution level in the city of Delhi has gone bad to worse. In fact, as per a study carried out by the World Health Organization (WHO) among 1600 cities, Delhi is the worst of any major cities in the world in terms of air pollution.
In November 2016, air pollution of the city spiked far beyond bearable levels. Levels of PM2.5 and PM 10 particulate matter hit 999 micrograms per cubic meter, while the safe limits for these pollutants are just 60 and 100 respectively.
Further in November 2017, the Central Pollution Control Board (CPCB) revealed that the air quality index (AQI) was as much as 448, making it ‘severe’ — considered as the worst category and one that comes with the warning that even healthy people are affected by the toxic air.
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