373 or 1,747? What was Delhi's actual AQI on Diwali and why did readings differ

Air quality readings from different platforms showed significant discrepancies during Diwali, raising concerns about measurement methods. While the official Central Pollution Control Board AQI remained below 400, some applications reported much higher levels. Variations exist between India's and the US's AQI calculation methodologies, influencing the reported numbers. Additionally, the reliability of data sources can impact the accuracy of air quality readings.