Chandigarh, Nov. 4 -- The air quality index (AQI) of the city, which had started to see some improvement, deteriorated again on Sunday and Monday.

As per the daily bulletin released by the Central Pollution Control Board (CPCB), the AQI of Chandigarh was 170 (moderate) on Saturday but on Sunday, it rose to 233 (poor) and stayed in the same category at 216 on Monday.

The AQI of Panchkula continued to remain worse than Chandigarh and was 308 (very poor)on Sunday. On Monday, it dropped to 294, which is still poor.

AQI between 201-300 is considered poor and can cause breathing discomfort to most people on prolonged exposure. AQI between 301-400 is considered very poor and can cause respiratory illness on prolonged exposure. The bulletin ta...