"aqi"

With Diwali around the corner, the Delhi Government had already banned the sale and bursting of firecrackers in the city to prevent further deterioration of air quality.

An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

Delhi recorded an AQI of 380 at 9:30 am. The 24-hour average AQI was 395 on Thursday. It was 297 on Wednesday, 312 on Tuesday, 353 on Monday, and 349 on Sunday.

The central government's Air Quality Early Warning System for Delhi said Delhi's air quality was likely to remain “very poor” till October 31.

An AQI between 0 and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.