Delhi Diwali Pollution: Vehicles and Firecrackers Both Major Contributors

Delhi’s Diwali air quality crisis stems from a complex mix of vehicle emissions and firecrackers, not just one source. The Indian Institute of Tropical Meteorology (IITM) data reveals that vehicles remain the single largest contributor to the city’s daily PM2.5 pollution, accounting for <b>25%</b> of the total burden on October 24. Even on Diwali day, November 8, transport emissions contributed <b>19%</b> to PM2.5 levels, making it the largest identified source. While firecrackers cause sharp, short-term spikes in harmful particles, vehicles provide a persistent, year-round load. This combination creates a severe pollution episode that is difficult to manage. Weather conditions further worsen the situation by trapping pollutants near the ground With Delhi’s AQI averaging <b>376</b> on Diwali, experts note that curbing festive spikes alone is insufficient.