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On Tuesday morning residents of this heavily contaminated metropolis found themselves breathing severely hazardous air that fell into the "critical" level.

Record-Breaking Air Quality Levels

Multiple areas of the city showed an pollution measurement above 500, which represents ten times the healthy threshold recommended by the WHO.

Certain monitoring stations, concentrations of dangerous airborne particles soared to of 1800, representing 15-20x higher than safe standards.

Pyrotechnics Restrictions and New Developments

For the past four years, authorities had enforced a comprehensive restriction on the sale and use of pyrotechnics during Diwali due to their significant contribution to the dangerous smog that covers the capital as winter begins.

Nevertheless recently, the current regional government petitioned the highest court to seek a easing of the ban.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically questioned by environmental experts as being only about 30% lower impact – as a compromise between "cultural practices and ecological concerns".

Court Decision and Enforcement

Much to the frustration of public health and environmental activists, judicial authorities agreed to the request, specifying that green firecrackers could be set off during specific periods throughout the Diwali.

During the celebrations, there was widespread violation of the time restrictions across the metropolis, with insufficient regulation regarding whether the fireworks being used were actually the eco-friendly version.

Many recording stations throughout the city registered contamination peaking around the night hours to some of the worst levels observed during the festival in at least the past three years.

Regional Implications

The widespread use of fireworks during Diwali also sparked a controversy with bordering the neighboring country, with representatives in Pakistani Punjab partially attributing worsening atmospheric conditions in Lahore on contaminants originating in India following the festivities.

Long-Standing Pollution Issue

Extremely elevated concentrations of air contamination in the city have persisted as a significant challenge for over a decade and a half, with the situation continuing to worsen.

Around the festival period, the concentration of dangerous airborne contaminants in the atmosphere has been observed to increase dramatically to significantly exceeding the most severe levels ever measured in the Chinese city, which was formerly regarded as the world's most polluted city.

Various Pollution Sources

The problem in the city is caused by a combination of different contributors including heavy vehicle emissions, dust, construction activities, garbage fires and smoke from crop residue ignition in nearby regions of farming communities.

Within these states, rural residents regularly burn crop residue to clear them quickly, generating dangerous haze that remains stagnant over the metropolitan area as cooler air sets in.

Medical and Economic Impact

Both financial and medical toll on the approximately 33 million inhabitants living in the capital region is significant, according to numerous research.

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

The pollution is calculated to be accounting for approximately 10k early deaths annually in the city.