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As Tuesday dawned inhabitants of this heavily contaminated metropolis encountered breathing severely hazardous air that fell into the "severe" range.

Extremely High Pollution Readings

Multiple areas of Delhi showed an AQI exceeding 500, which represents 10x the healthy threshold recommended by the World Health Organization.

Certain monitoring stations, levels of dangerous airborne particles hit highs of eighteen hundred, amounting to 15 to 20 times higher than acceptable limits.

Pyrotechnics Restrictions and Current Policy Shifts

For the past four years, the government had enforced a total prohibition on the purchase and ignition of pyrotechnics during Diwali due to their significant contribution to the dangerous haze that covers the metropolis as colder weather sets in.

However recently, the recently formed city government approached the highest court to propose a modification of the prohibition.

They proposed allowing "eco-friendly fireworks" – which have been doubted by conservation groups as being only about 30% lower impact – as a middle ground between "tradition and environment".

Legal Decision and Enforcement

To the disappointment of medical and ecological advocates, judges complied with the request, specifying that environmentally conscious fireworks could be ignited during specific time windows throughout the Diwali.

Throughout the festival evening, there was widespread flouting of the time restrictions across the capital, with little enforcement regarding whether the firecrackers being used were actually the eco-friendly variety.

Several air quality sensors throughout Delhi showed pollution peaking around the night hours to the most severe measurements seen during celebrations in at least the past three years.

Cross-Border Consequences

Extensive ignition of fireworks during the festival also sparked a dispute with adjacent Pakistan, with representatives in Pakistan's Punjab province partially attributing worsening atmospheric conditions in their urban centers on hazardous particles originating in across the border following the events.

Chronic Environmental Problem

Alarmingly severe levels of air contamination in the capital have continued as a significant problem for fifteen-plus years, with the problem showing no improvement.

Around celebratory seasons, the amount of hazardous particles in the environment has been found to spike to 70% higher the most severe records ever measured in the Chinese city, which was formerly regarded as the planet's dirtiest city.

Various Contamination Factors

The situation in Delhi is resulting from a convergence of multiple factors including transportation pollution, construction debris, construction activities, garbage fires and pollutants from crop residue ignition in adjacent states of neighboring agricultural zones.

Throughout these areas, rural residents regularly ignite agricultural waste to prepare for next season, generating toxic haze that remains stagnant over the city as cooler air arrives.

Medical and Economic Impact

Public health and economic toll on the nearly 33 million inhabitants calling home the capital region is substantial, according to numerous studies.

This pollution results in high levels of neurological, cardiovascular and respiratory disorders, and can result in cancer.

Air quality crisis is estimated to be accounting for approximately 10k premature deaths each year in the city.