Panchkula, Nov. 9 -- Air quality in Gurugram deteriorated to the 'very poor' category on Monday, with an Air Quality Index (AQI) of 345, marginally higher than Delhi's 344, while Haryana's Bahadurgarh recorded a reading of 400, just one point below the 'severe' threshold, according to the latest official pollution bulletin.

The National Capital Region continued to grapple with widespread air pollution a day after Diwali, with 18 of the 33 monitored cities and towns across Haryana, Delhi, Uttar Pradesh and Rajasthan reporting 'very poor' air quality.

The November 9 bulletin, issued at 4 p.m., showed that nine locations in Haryana had entered the 'very poor' category, with five recording higher AQI levels than Delhi. Bahadurgarh in Jhajjar ...