Mumbai's Air Quality Index reached 117 on Wednesday, an improvement from the previous day, according to data from aqi.in.

The air quality index continued to fluctuate between the "severe" and "very poor" categories in Delhi. The city's 24-hour average air quality index, recorded until 4 pm on Sunday, was 318 (very poor),

Delhi's air quality plummeted to 'severe' on Saturday, with an AQI of 412, posing significant health risks. Twenty monitoring stations recorded 'severe' readings, primarily due to vehicular emissions and stubble burning.

Residents of the national capital breathed in despair on Saturday, with the air quality plunging back to the 'severe' category as average Air Quality Index (AQI) pegged at 412.

The AQI in Anand Vihar was recorded as 457; the AQI in Ashok Vihar was 455; Chandni Chowk's AQI was 439 and RK Puram recorded an AQI of 421.

With the overall Air Quality Index (AQI) reading 422 at 6 AM on Saturday, Delhi was once again engulfed in a dense layer of poisonous haze as the air quality fell into the "Severe" category. According to the Central Pollution Control Board (CPCB),