Air Quality Index (AQI) was recorded on Wednesday at 337 by the System of Air Quality and Weather Forecasting And Research (SAFAR). According to the SAFAR, Delhi's air quality was recorded in the 'very poor' category on Wednesday. Earlier on Tuesday, the national capital woke up to smog with the Air Quality Index (AQI) recorded at 340 by SAFAR. The 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 to 500 or above it is considered as severe.

Earlier on Sunday, the Commission for Air Quality Management (CAQM), a Union government panel recommending steps to control air pollution in the national capital, announced a temporary ban on construction and demolition activities in Delhi-NCR as part of its Graded Response Action Plan (GRAP). The announcement came after the air quality in Delhi and the national capital region breached the 'severe' category.