Watch | Delhi AQI mystery: Why did air monitors go silent on Diwali night?
Missing PM2.5 readings and varying app formulas left Delhi residents confused during peak pollution. Which AQI number actually tells the real story?
On Diwali night, Delhi's air monitors went silent when pollution peaked. Forty two per cent of expected PM2.5 readings were missing after 10 pm. The CPCB says its instruments cap readings at 1,000 µg/m³, and the pollution levels went past it. Missing data dragged the city's AQI down, and the air looked cleaner than it was on paper. Another occurrence that left people confused was different AQI readings on different apps. Experts attribute it to different approaches, formulas, scales and sensors used by different platforms, including the CPCB.
Watch the video to know more.
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