TOI Explains: AQI of 3,000? Why your app data seems more alarming than the official one

Air quality measurements can vary significantly between apps and official sources, leading to public confusion. CPCB uses a specific methodology, calculating AQI based on multiple pollutants and averaging periods. Conversely, some apps may report higher numbers due to different methods or shorter averaging periods, which can cause misunderstanding. Individuals should be cautious and understand the source, method, and interpretation of AQI readings.