Delhi's air quality has deteriorated post Diwali with slow wind speed making matters worse

According to the SAMEER app, Anand Vihar recorded an Air Quality Index (AQI) of 428, the highest among all monitoring stations

Most other stations across the city recorded air quality in the very poor range, leaving only six stations in the poor category out of 48

The AQI at 9 am stood at 326, according to the Central Pollution Control Board (CPCB) hourly bulletin

As per the CPCB, an AQI between zero and 50 is considered "good", 51 to 100 "satisfactory", 101 to 200 "moderate", 201 to 300 "poor", 301 to 400 "very poor" and 401 to 500 "severe"