Diwali Pollution: Impacts on Air Quality and Urban Wildlife
Diwali Pollution: Impacts on Air Quality and Urban Wildlife
IN · Published Nov 9, 2026
• The festival of Diwali, celebrated on 8 November 2026, has brought attention to the environmental and ecological impacts of its associated activities, particularly the use of fireworks.
• According to Climate Trends' analysis of CPCB data, Delhi's air quality index (AQI) reached severe levels, with PM2.5 concentrations rising from 156.6 µg/m³ before Diwali 2025 to 488 µg/m³ after the festival.

Impact & Risks

The post-Diwali spike in air pollution poses severe health risks, particularly for individuals with respiratory conditions, children, and the elderly. Urban wildlife, including birds and street animals, are significantly affected by the noise and light from fireworks, leading to stress, disorientation, and in some cases, injury or death. Studies have shown that birds fly higher and in larger numbers during fireworks, disrupting their natural behaviours. Street dogs and other animals, unable to find shelter, are also highly distressed by the loud noises. In mountain towns, the lack of comprehensive monitoring raises concerns about unmeasured environmental impacts, including pollution in streams and harm to local ecosystems.

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