Chandigarh, Dec. 6 -- The city's air quality index (AQI) has once again turned poor due to the drop in temperature. Some relief from the cold is expected over the weekend as a feeble Western Disturbance (WD) will affect the region.

As per the daily AQI bulletin, released by the Central Pollution Control Board (CPCB), the AQI of Chandigarh on Friday was 213, which is considered poor. This is calculated by taking the average of all three Continuous Ambient Air Quality Monitoring Stations (CAAQMS) situated in the city. The readings taken at 4 pm are used for this. As per the CPCB, AQI between 201-300 is considered poor and can cause breathing discomfort to most people on prolonged exposure.

This comes after around a month of moderate to sa...