The mercury dipped to even lower levels in some parts of the city, recording 3.3 degrees Celsius and 3.4 degrees Celsius at Lodhi Road and Ayanagar, respectively.
An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".
