Chandigarh, Nov. 11 -- The city's air quality remained in the moderate category for the second consecutive day on Tuesday, following a spike to the very poor level on Diwali night.

The air quality index (AQI) had climbed to 326 at the Continuous Ambient Air Quality Monitoring Station (CAAQMS) in Sector 25 around Diwali midnight, while the readings at the Sector 22 and Sector 53 stations had remained in the moderate category.

The city's AQI, calculated as the average of readings from all three monitoring stations, had returned to the moderate category by Monday. According to the Central Pollution Control Board (CPCB), the city's AQI stood at 160 at 7 pm on Monday. At the same time on Tuesday, it was recorded at 141, indicating a marginal...