Smog covers Delhi, air quality plummets to ‘very poor’ category on Diwali

State Environment Minister Gopal Rai said that 377 teams were formed to enforce the ban on firecrackers across the national capital during the festival.

Smog covers Delhi, air quality plummets to ‘very poor’ category on Diwali

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The air quality in Delhi plummeted to the “very poor” category on Thursday as a thick layer of smog covered parts of the national capital on the morning of the Diwali festival, NDTV reported.

According to data from the Central Pollution Control Board, 39 stations in the city recorded an average Air Quality Index of 329 at 7 am. Anand Vihar saw the worst air quality with the index going to 419, which falls under the “severe” category.

An index value between 0 and 50 indicates “good” air quality, between 51 and 100 indicates “satisfactory” air quality and between 101 and 200 indicates “moderate” air quality.

As the index value increases further, air quality deteriorates. A value of 201 and 300 means “poor” air quality while between 301 and 400 indicates “very poor” air. Between 401 and 450 indicates “severe” air pollution while anything above the 450 threshold is termed “severe plus”.

The air quality in the national capital was likely to be in the “very poor” category over the next two days, PTI reported on Wednesday, quoting unidentified officials from the Indian Institute of Tropical Meteorology in Pune.

The index may also reach the severe category in case of additional emissions from firecrackers and stubble or waste fires on these two days, the officials said.