According to the Central Pollution Control Board, Bhiwani recorded the most polluted air at 4 pm on Friday with an AQI of 406. It fell in the 'severe' category. Ballabgarh had an AQI of 320, Sonipat had an AQI of 317, while Bikaner and Fatehabad each had an AQI of 309. The AQI of Hanumangarh was 304.