The air quality in Delhi continued to remain in the 'very poor' category on Wednesday morning as the overall Air Quality Index (AQI) of the city stood at 354. Noida, which is part of the national capital region, slipped to an AQI of 406, and continued to remain in the 'severe' category, while Gurugram's AQI stood at 346 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.
Air Quality Index from 0 to 100 is considered as good, while from 100 to 200 it is moderate, from 200 to 300 it is poor, and from 300 to 400 it is said to be very poor and from 400 too 500 or above it is considered as severe.