India, Nov. 8 -- Delhi's overall air quality remained in the 'very poor' category on Saturday morning with an AQI of 335, according to the Air Quality Early Warning System for Delhi. The city woke up to a thick layer of haze as winter began to set in, worsening pollution levels across several parts of the national capital.This came after Delhi's 24-hour average AQI stood at 322 on Friday, placing the city in the 'red zone' and making it the most polluted urban centre in the country, Central Pollution Control Board (CPCB) data showed.According to CPCB data as of 8:00 am today, Bawana (403) recorded the worst air quality in the city, entering the 'severe' category. It was followed closely by Vivek Vihar (387) and Wazirpur (381). Areas such ...