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As Tuesday dawned inhabitants of this heavily contaminated metropolis were faced with breathing extremely polluted air that was classified as the "alarming" category.

Record-Breaking Air Quality Readings

Multiple areas of the capital recorded an pollution measurement above 500, which represents 10x the recommended limit set by the global health authority.

In some locations, concentrations of toxic particulate matter reached peaks of 1,800, amounting to 15 to 20 times exceeding acceptable standards.

Pyrotechnics Ban and Current Changes

Since 2020, authorities had enforced a comprehensive restriction on the distribution and bursting of pyrotechnics during the Festival of Lights due to their significant contribution to the hazardous haze that covers the capital as the cold season sets in.

Nevertheless recently, the recently formed city government appealed to the highest court to seek a easing of the ban.

The suggestion was allowing "eco-friendly fireworks" – which have been doubted by environmentalists as being only approximately one-third reduced emissions – as a balance between "tradition and public health".

Court Decision and Reality

Despite concerns of medical and ecological campaigners, the court approved the proposal, mandating that environmentally conscious fireworks could be ignited during limited time windows throughout the Diwali.

Throughout the festival evening, there was widespread violation of the designated hours across the city, with insufficient regulation regarding whether the fireworks being used were actually the supposedly greener version.

Many monitoring devices throughout the city recorded contamination spiking around the night hours to the most severe readings recorded during the festival in at least recent memory.

Cross-Border Effects

Extensive ignition of fireworks during Diwali also initiated a controversy with bordering Pakistan, with officials in Pakistan's Punjab partially attributing deteriorating pollution levels in Lahore on hazardous particles coming from India following the festivities.

Chronic Environmental Issue

Extremely elevated levels of pollution in the city have remained as a major issue for fifteen-plus years, with the condition gradually deteriorating.

Around the festival period, the levels of toxic particles in the environment has been found to shoot up to significantly exceeding the worst records ever recorded in the Chinese city, which was once considered as the world's most polluted metropolis.

Diverse Contamination Factors

This crisis in the city is attributed to a convergence of different contributors including transportation pollution, airborne particles, building projects, garbage fires and haze from agricultural fires in adjacent areas of Punjab and Haryana.

Throughout these areas, farmers regularly set their fields on fire to clear them quickly, producing dangerous pollution that becomes contained over the metropolitan area as colder air descends.

Medical and Financial Impact

The economic and health toll on the approximately 33 million inhabitants residing in the capital region is substantial, according to multiple research.

These hazardous conditions leads to elevated rates of neurological, cardiovascular and breathing disorders, and can even lead to cancer.

Air quality crisis is projected to be responsible for 10,000 untimely deaths each year in Delhi.