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As Tuesday dawned inhabitants of this heavily contaminated metropolis found themselves breathing severely hazardous air that was classified as the "alarming" level.

Record-Breaking Air Quality Levels

Various sections of Delhi recorded an AQI exceeding 500, which represents ten times the recommended threshold recommended by the World Health Organization.

In some locations, readings of dangerous airborne particles hit highs of 1800, representing 15-20x above acceptable limits.

Fireworks Prohibition and Recent Changes

Beginning in 2020, authorities had implemented a comprehensive restriction on the sale and use of fireworks during celebrations due to their substantial impact to the deadly smog that covers the capital as colder weather begins.

However recently, the current regional administration appealed to the supreme court to seek a relaxation of the ban.

Officials advocated for allowing "environmentally conscious pyrotechnics" – which have been doubted by environmentalists as being only roughly 30 percent lower impact – as a middle ground between "tradition and public health".

Court Verdict and Implementation

Despite concerns of medical and ecological advocates, judicial authorities approved the appeal, stipulating that environmentally conscious fireworks could be used during limited hours throughout the Diwali.

Throughout the festival evening, there was widespread flouting of the time restrictions across the metropolis, with insufficient enforcement regarding whether the firecrackers being used were actually the more environmentally friendly type.

Many monitoring devices throughout the capital showed contamination spiking around midnight to some of the worst levels observed during Diwali in at least three years.

International Consequences

The proliferation of pyrotechnics during the celebrations also sparked a blame game with bordering the neighboring country, with authorities in Pakistani Punjab partially attributing deteriorating atmospheric conditions in Lahore on hazardous particles originating in India following the events.

Long-Standing Pollution Problem

Alarmingly severe readings of atmospheric toxins in the capital have continued as a major problem for fifteen-plus years, with the situation showing no improvement.

Around Diwali, the concentration of hazardous particulate matter in the atmosphere has been observed to spike to significantly exceeding the most severe readings ever recorded in Beijing, which was once viewed as the planet's dirtiest urban center.

Diverse Pollution Sources

The situation in the city is resulting from a convergence of various sources including heavy vehicle emissions, construction debris, construction activities, rubbish burning and haze from agricultural fires in adjacent regions of farming communities.

Throughout these areas, agricultural workers regularly burn crop residue to prepare for next season, producing dangerous haze that becomes contained over the city as cooler air descends.

Public Health and Financial Consequences

The economic and health consequences on the approximately 33 million people residing in the metropolitan zone is substantial, according to multiple research.

This pollution causes high levels of nervous system, heart and circulatory and respiratory diseases, and can even lead to oncological diseases.

The pollution is projected to be causing 10,000 premature fatalities per year in the city.