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As Tuesday dawned citizens of the planet's dirtiest urban center encountered breathing severely hazardous air that registered in the "severe" level.

Extremely High Pollution Measurements

Various sections of the city showed an air quality index over 500, which represents ten times the healthy threshold set by the global health authority.

Particular areas, concentrations of PM2.5 and PM10 hit highs of 1800, amounting to 15 to 20 times above acceptable limits.

Pyrotechnics Restrictions and Current Policy Shifts

Since 2020, the government had maintained a complete ban on the sale and use of fireworks during Diwali due to their substantial impact to the deadly haze that covers the city as colder weather begins.

Yet in recent months, the current regional government approached the highest court to seek a easing of the ban.

They proposed allowing "environmentally conscious pyrotechnics" – historically doubted by environmentalists as being only about 30% lower impact – as a compromise between "heritage and ecological concerns".

Court Ruling and Enforcement

Despite concerns of environmental and health campaigners, judicial authorities agreed to the request, specifying that green firecrackers could be used during limited periods throughout the festival.

During the celebrations, there was extensive disregard of the regulated periods across the capital, with insufficient monitoring regarding whether the firecrackers being used were actually the supposedly greener version.

Many air quality sensors throughout Delhi recorded contamination reaching highest levels around late evening to the most severe levels observed during Diwali in at least recent memory.

Cross-Border Implications

The proliferation of firecrackers during the celebrations also triggered a blame game with neighbouring Pakistan, with representatives in Pakistani the Punjab region pointing to declining atmospheric conditions in their urban centers on pollutants coming from India following the events.

Persistent Environmental Crisis

The dangerously high levels of air contamination in the city have persisted as a significant issue for more than 15 years, with the situation continuing to worsen.

Around celebratory seasons, the concentration of hazardous airborne contaminants in the atmosphere has been observed to shoot up to seventy percent above the worst levels ever recorded in Beijing, which was previously regarded as the planet's dirtiest urban center.

Various Pollution Contributors

This crisis in Delhi is caused by a mix of various sources including transportation pollution, dust, building projects, rubbish burning and haze from agricultural fires in neighbouring states of farming communities.

In these regions, farmers illegally ignite agricultural waste to prepare for next season, creating toxic pollution that remains stagnant over the city as cooler air sets in.

Health and Financial Toll

Both financial and medical consequences on the approximately 33 million people calling home the metropolitan zone is substantial, according to various research.

This pollution causes increased incidence of nervous system, cardiovascular and lung disorders, and can even lead to oncological diseases.

Air quality crisis is estimated to be accounting for approximately 10k untimely deaths annually in the city.