India, Nov. 9 -- Delhiites woke up to another day of toxic air on Sunday, as pollution levels remained alarmingly high. Data from the Air Quality Early Warning System on early morning showed an AQI of 392, while multiple areas crossed the 400 mark, ranking the capital among the worst polluted cities nationwide.

According to the Central Pollution Control Board (CPCB), the city's 24-hour average AQI stood at 361 at 4 pm on Saturday, placing it in the 'red zone'.

CPCB categorises an AQI between 0 and 50 in "good" level, 51 to 100 "satisfactory", 101 to 200 "moderate", 201 to 300 "poor", 301 to 400 "very poor" and 401 to 500 "severe" category.

Monitoring stations reported AQI readings of 415 at Alipur, 420 at ITO, 426 at Nehru Nagar, 424 a...