The Air Quality Index of some cities was by the Central Pollution Control Board. (Representational Image)

The following is the Air Quality Index of some cities as recorded by the Central Pollution Control Board (CPCB) at 4 p.m. on Thursday.City Air Quality Index ValueAgra Very Poor 333Bengaluru Satisfactory 59Chandrapur Moderate 138Delhi Very Poor 321Faridabad Very Poor 318Hyderabad Satisfactory 91Jaipur Good 41Jodhpur Very Poor 325Lucknow Severe 408Mumbai Moderate 126Muzaffarpur Very Poor 322Navi Mumbai Moderate 102Pune Poor 211Varanasi Very Poor 302The scale to determine the air quality through the Air Quality Index is as follows:0-50 Good Minimal impact51-100 Satisfactory Minor breathing discomfort to sensitive people101-200 Moderate Breathing discomfort to the people with asthma and heart diseases201-300 Poor Breathing discomfort to most people on prolonged exposure301-400 Very Poor Respiratory illness on prolonged exposure401-500 Severe Seriously impacts those with existing diseases