Data from Central Pollution Control Board (CPCB) showed that the hourly air quality index (AQI) stood at 76.
On Sunday, the average 24-hour AQI was 78, which is in the mid-range of the satisfactory category.
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’.