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Tuesday brought residents of this heavily contaminated metropolis encountered exposed to extremely polluted air that fell into the "critical" range.

Record-Breaking Air Quality Readings

Several parts of the capital recorded an air quality index over 500, which equals a tenfold increase over the safe limit set by the WHO.

Particular areas, levels of toxic particulate matter reached peaks of 1,800, amounting to fifteen to twenty times exceeding acceptable limits.

Pyrotechnics Ban and New Changes

For the past four years, the government had implemented a total prohibition on the sale and use of pyrotechnics during celebrations due to their substantial impact to the hazardous haze that blankets the capital as colder weather approaches.

Nevertheless in recent months, the recently formed local leadership petitioned the supreme court to propose a modification of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – previously doubted by environmental experts as being only approximately one-third less polluting – as a middle ground between "tradition and ecological concerns".

Court Ruling and Implementation

Despite concerns of medical and ecological campaigners, judicial authorities complied with the appeal, stipulating that environmentally conscious fireworks could be used during designated periods throughout the festival.

Throughout the festival evening, there was considerable flouting of the regulated periods across the city, with minimal enforcement regarding whether the pyrotechnics being used were actually the more environmentally friendly version.

Numerous monitoring devices throughout Delhi registered contamination reaching highest levels around late evening to the most severe measurements seen during celebrations in at least three years.

Cross-Border Effects

The widespread use of pyrotechnics during the festival also initiated a dispute with adjacent Pakistan, with representatives in Pakistani Punjab province pointing to deteriorating pollution levels in the city of Lahore on contaminants coming from neighboring India following the events.

Chronic Environmental Problem

The dangerously high concentrations of atmospheric toxins in Delhi have continued as a major challenge for over a decade and a half, with the problem gradually deteriorating.

Near the festival period, the concentration of toxic particulate matter in the atmosphere has been observed to increase dramatically to seventy percent above the most severe levels ever documented in Beijing, which was formerly considered as the world's most polluted city.

Various Contamination Sources

The situation in the city is attributed to a mix of different contributors including automobile exhaust, construction debris, development work, waste incineration and smoke from agricultural fires in neighbouring areas of farming communities.

Within these states, farmers regularly ignite agricultural waste to prepare for next season, creating hazardous haze that then gets trapped over the metropolitan area as cooler air arrives.

Public Health and Financial Toll

Public health and economic toll on the nearly 33 million inhabitants calling home the metropolitan zone is substantial, according to multiple studies.

These hazardous conditions results in increased incidence of neurological, heart and circulatory and lung disorders, and can potentially cause cancer.

Environmental contamination is calculated to be causing approximately 10k premature deaths per year in Delhi.