Rohtak, Nov. 7 -- Two days after air quality deteriorated in six Haryana cities, the regional pollution levels on Friday sharply worsened further across several districts, particularly in the National Capital Region (NCR), with nine cities recording an Air Quality Index (AQI) above 300.

The worst-hit was Ballabgarh, which recorded the highest AQI at 397, followed by Gurugram at 368, Bhiwani at 353, Hisar at 333, Manesar at 332, Bahadurgarh at 328, Faridabad at 313, Charkhi Dadri at 310, and Rohtak at 306. The situation is also worrying in other parts of the state, with Sonepat and Ambala recording an AQI of 270 each, followed by Dharuhera (272), Jind (252), Kurukshetra (243), Kaithal (223), Panipat (214), Karnal (212), and Narnaul (209)....