Delhi's air quality plummets to severe levels after Deepavali festivities

The national capital's air quality deteriorated sharply following the festival period, with air quality index readings breaching the 400 mark at several locations across Delhi. The severe pollution episode marks a significant decline from pre-festival conditions, driven largely by the accumulated effects of festival-related activities and prevailing meteorological conditions that have trapped pollutants over the city.

Fine particulate matter concentrations, measured as PM2.5, have surged to alarming levels across multiple districts. These microscopic particles, which pose direct risks to respiratory and cardiovascular health, have far exceeded the guidelines established by the World Health Organisation. Health authorities have noted that prolonged exposure to such pollution levels poses particular risks to vulnerable populations, including children, the elderly, and those with pre-existing respiratory conditions.

The smog engulfing Delhi represents a recurring post-festival phenomenon in the region, as celebration-related activities combine with seasonal factors that reduce atmospheric dispersion. Environmental experts have attributed the severity to a combination of local emission sources and weather patterns that limit air circulation during this period of the year.