Despite the overall improvement, Delhi witnessed six days of "severe" air quality in December, with AQI readings above 400. The conditions prompted strict measures, including restrictions on construction activities and vehicle movement. School and office schedules were also tweaked to minimize the impact of poor air quality on residents' health.

Delhi saw 209 days in 2024 with an AQI below 200, indicating 'Good to Moderate' air quality, which is the highest count recorded, excluding the Covid-19 lockdown year of 2020.

The CAQM data shows that 2024 was one of the best years in respect to the air quality in the National capital. February, December and August recorded the best average Air Quality Index (AQI) in six years,

Adding to the alarming scenario, Delhi did not record a single day of "Good" air quality (AQI 0-50) throughout 2024

Delhi recorded its worst air quality in five years with an average AQI of 209, and no 'good air days'. December, despite being the cleanest on record, saw six 'severe' days. Experts highlight the need for stricter and more comprehensive measures to tackle pollution and achieve sustained air quality improvements.