With Diwali almost upon us, the Air Quality in Delhi deteriorated considerably as it entered the "very poor" category for the first time this season.
According to Central Pollution Control Board, the Air Quality Index (AQI) of the city on Tuesday was 303.
Delhi's neighbouring cities-- Faridabad, Ghaziabad and Noida also recorded very poor air quality with 306, 334 and 303 respectively. Before this, the highest AQI of the season recorded in Delhi was 298 in the poor category on October 17.
An AQI between zero to 50 is considered "good", 51 to 100 "satisfactory", 101 to 200 "moderate", 201 to 300 "poor", 301 to 400 "poor" and 401 to 500 "severe".
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