NEW DELHI: India’s capital choked under a thick blanket of smog on Sunday, with the government imposing anti-pollution curbs after monitoring stations in some areas recorded extremely hazardous air quality.
Home to 30 million people, Delhi has not recorded a single “clean air” day in 2025, with Air Quality Index readings hitting high above the 50 score throughout the year.
On the AQI scale from 0 to 500, good air quality is represented by levels below 50, while levels above 300 are dangerous.
Worsening since late October, official records over the weekend were in the severe to severe-plus range of 400–500, but as 24-hour averages, they did not capture the peaks. Private monitors in several parts of North and North West Delhi recorded AQI spikes above 550 and even into the 700s in real-time.
On Saturday evening, the Ministry of Environment’s Commission for Air Quality Management invoked stage four — the highest level — of the Graded Response Action Plan for Delhi and surrounding areas.
