New Delhi: Delhiites woke up on Thursday to a thick envelope of smog as air quality in the national capital and in adjoining regions, dipped into severe category again. The Air Quality Index (AQI) in the national capital at 8 am was at 364 (in the 'Very Poor' category) and at 7 am the recorded AQI stood at 408 ('Severe').
Unfavorable meteorological conditions with slower wind speed and sudden spike in farm fire incidents are attributed to the dip in air quality. An AQI between 401 and 500 is categorized as severe. Noida, which is part of the national capital region, slipped to an AQI of 393, in the 'very poor' category, while Gurugram's AQI stood at 318 and continued to remain in the 'very poor category, as per data released by SAFAR (System of Air Quality and Weather Forecasting And Research) India.
An AQI range between 0 to 100 is considered as good, while from 100 to 200, it is termed moderate and from 200 to 300, it is poor. AQI ranging from 300 to 400 is said to be very poor. North Delhi Air Quality recorded the poorest as almost all the stations in the region displayed AQI above 400.