Greater Noida, Nov. 19 -- The Central Pollution Control Board's (CPCB) 4 pm national bulletin on Tuesday identified Greater Noida as the most polluted city in India, with an Air Quality Index (AQI) of 454, firmly in the "severe" category. Marking a sharp decline from its Monday level of 390 ("very poor").

Meanwhile, Ghaziabad ranked as the nation's second-worst polluted city, recording a 'severe' AQI of 434 for the third consecutive day. Noida, with an AQI of 390, was the fifth worst-affected city, its air quality categorised as "very poor". A day earlier, the AQI levels in Noida and Ghaziabad were 358 and 401, respectively.

In Greater Noida, both of the city's active air quality monitoring stations under the Uttar Pradesh Pollution Con...