End of winter report 2023-24: Spread and scale of air pollution crisis in India

2 Urban Lab - Centre for Science and Environment Analysis Key findings All India summary North India and East India were the most polluted regions in the country, while South India was the cleanest: The average of winter PM2.5 level of cities among the seven major regions of the country shows that the North and East are the most polluted. [...] Among other major cities Chandigarh registered winter average of 100.9 µg/m3 and winter peak of 283 µg/m3, Jaipur registered winter average of 89.6 µg/m3 and winter peak of 179 µg/m3, and Lucknow registered winter average of 82.8 µg/m3 and winter peak of 145 µg/m3. [...] Among other major cities Patna registered winter average of 117.1 µg/m3 and winter peak of 210 µg/m3, Bhubaneswar registered winter average of 100 µg/m3 and winter peak of 242 µg/m3, and Kolkata registered winter average of 77.1 µg/m3 and winter peak of 135 µg/m3. [...] Among other major cities Navi Mumbai registered winter average of 71.2 µg/m3 and winter peak of 118 µg/m3, Surat registered winter average of 69.2 µg/m3 and winter peak of 296 µg/m3, Ahmedabad registered winter average of 61.2 µg/m3 and winter peak of 128 µg/m3, and Mumbai registered winter average of 60.6 µg/m3 and winter peak of 112 µg/m3. [...] Among other major cities Hyderabad registered winter average of 43.6 µg/m3 and winter peak of 99 µg/m3, Bengaluru registered winter average of 41.3 µg/m3 and winter peak of 92 µg/m3, Chennai registered winter average of 36.5 µg/m3 and winter peak of 146 µg/m3, and Thiruvananthapuram registered winter average of 29.5 µg/m3 and winter peak of 118 µg/m3.