However, on Thursday, most air quality monitoring stations across the city had "very poor" air quality and the AQI touched 390.
"The above status indicates non-compliance of the Supreme Court order," the letter said.
"Direction is hereby issued to the commissioner of police, Delhi, to submit a report on action taken to prevent the sale of unauthorised firecrackers in Delhi," it said.
On Friday, it reached "severe" levels at 423.
Authorities attributed the spike in pollution level to the burning of toxic firecrackers.In the letter addressed to the Delhi Police commissioner, CPCB chairperson SP Singh Parihar said it had been reported that firecrackers other than those permitted by the apex court were sold and burst on Diwali in Delhi.
Your support to NYOOOZ will help us to continue create and publish news for and from smaller cities, which also need equal voice as much as citizens living in bigger cities have through mainstream media organizations.
Stay updated with all the Latest Faridabad headlines here. For more exclusive & live news updates from all around India, stay connected with NYOOOZ.