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Pre-to-post Diwali air quality index (AQI) of Bhavnagar for the year 2021
PM10, PM2.5, SO2, NO2, and Pb are considered for calculating AQI, and the concentration of these parameters is for 24 h
*Green color resembles the “satisfactory” category (AQI range: 51–100)
**Yellow color resembles the “moderately polluted” category (AQI range: 101–200)
***Orange color resembles the “poor” category (AQI range: 201–300)
****Red color resembles the “very poor” category (AQI range: 301–400)
