New Delhi: 224 at Chandni Chowk. 123 at Punjabi Bagh. And 100 at Najafgarh.

These were the number of hours that data on particulate matter 2.5, a toxic pollutant, was missing at air quality monitoring stations over the month of October.

ThePrint’s analysis of data available online by the Central Pollution Control Board (CPCB) showed that missing air quality data wasn’t just a Diwali night anomaly, even though it was substantially worse then. Show Full Article

After midnight on Diwali, on 21 October, 28 out of 39 pollution monitors across the capital went blank. It was the first Diwali to be celebrated in Delhi with ‘green firecrackers’ in four years, after the Supreme Court lifted a blanket ban that was effected in 2021.

A closer look at air quality data over the entire month showed t

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