The air quality was recorded in the poor category at 9 am on Thursday with an Air Quality Index (AQI) reading of 235, Central Pollution Control Board (CPCB) data showed.
According to the CPCB, 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’. PTI BM DV DV