NEW DELHI: Residents of Delhi woke up to hazardous air quality on Sunday as a thick blanket of toxic smog and fog engulfed the Indian capital region, pushing air pollution into “severe” levels for the first time this year.

Home to 30 million people, Delhi has not recorded a single “clean air” day since September 2023, with Air Quality Index readings hitting high above the 50 score throughout the past two years.

On the AQI scale from 0 to 500, good air quality is represented by levels below 50, while levels above 300 are dangerous.

Based on Central Pollution Control Board data, the overall AQI was around 439–444, with several stations across Delhi reaching almost 500 — the worst since the peak winter smog season in early November.

The air quality is so bad that a Danish badminton star, Anders Antonsen, withdrew from the ongoing India Open, saying the city was not fit to host the tournament. Antonsen, who is the discipline’s No. 3, said in an Instagram story that the decision was due to “extreme pollution.”