UP's Gr Noida records most noxious air in north India By IANS | Published on Thu, Mar 11 2021 15:42 IST | 0 Views Air pollution. (File Photo: IANS). Image Source: IANS News New Delhi, March 11 : Greater Noida in Uttar Pradesh, over 60 km from the national capital, recorded the most polluted air in the northern region on Thursday afternoon, according to the data from the Central Pollution Control Board (CPCB). Greater Noida, which comprises of residential and industrial areas, recorded the air quality index of 309 microgram per cubic meter, while Delhi logged it at 243, Ghaziabad at 283, Gurugram at 263, Noida and Faridabad at 283 and 264 microgram per cubic meter, respectively.