Delhi's air quality worsened further on Sunday, with an AQI of 441, making it the second-most polluted city in the country.

According to CPCB measures, an AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', 401 and 450 'severe' and above 450 'severe-plus'.

The Supreme Court is scheduled to hear on Monday (November 18, 2024) a plea seeking enforcement of measures to curb air pollution in the National Capital. Delhi woke up to toxic air conditions on Sunday (November 17, 2024) as the Air Quality Index (AQI) was recorded in the "severe" category.

In the latest development, the National Capital wakes up witnessing thick smog. The Air Quality Index(AQI) remains in the Severe category. #WATCH | Delhi: A layer of smog envelops the National Capital as the air quality continues to remain in the ‘Severe’ category as per the CPCB.

A bench of Justices Abhay S Oka and Augustine George Masih is scheduled to hear the plea, as per the Supreme Court's cause list for8.

Northern India encountered the recurring annual pre-winter event of air emergency where the Air Quality Index (AQI) readings of main pollutant PM 2.5 breached the 400-mark of “very poor” and landed the air of Delhi, Punjab and other northern cities into the “hazardous” category.

After reaching a peak, Delhi’s AQI has remained in the ‘severe’ category for the fourth day in a row. Covered in a thick blanket of fog and pollution, the poor visibility has even caused many school to remain closed for the past few days.