On Tuesday morning citizens of this heavily contaminated metropolis encountered breathing extremely polluted air that fell into the "critical" category.
Several parts of Delhi registered an air quality index exceeding 500, which represents a tenfold increase over the healthy limit recommended by the global health authority.
In some locations, readings of dangerous airborne particles reached peaks of eighteen hundred, amounting to fifteen to twenty times above healthy limits.
Beginning in 2020, the government had implemented a comprehensive restriction on the distribution and bursting of firecrackers during the Festival of Lights due to their major role to the hazardous smog that engulfs the city as the cold season approaches.
Nevertheless earlier this year, the current regional administration petitioned the judicial authority to propose a modification of the prohibition.
They proposed allowing "eco-friendly fireworks" – historically questioned by environmentalists as being only roughly 30 percent less polluting – as a middle ground between "tradition and ecological concerns".
Much to the frustration of medical and ecological activists, judicial authorities approved the proposal, stipulating that eco-friendly pyrotechnics could be set off during limited hours throughout the festival.
During the celebrations, there was considerable flouting of the regulated periods across the metropolis, with minimal monitoring regarding whether the firecrackers being used were actually the more environmentally friendly version.
Many monitoring devices throughout Delhi registered contamination spiking around the night hours to extremely hazardous readings observed during the festival in at least three years.
The proliferation of pyrotechnics during Diwali also sparked a blame game with bordering Pakistan, with authorities in Pakistani Punjab partly blaming deteriorating atmospheric conditions in the city of Lahore on hazardous particles originating in India following the festivities.
Alarmingly severe levels of air contamination in Delhi have continued as a major challenge for more than 15 years, with the situation continuing to worsen.
Near Diwali, the amount of toxic particles in the atmosphere has been documented to increase dramatically to seventy percent above the most severe readings ever measured in Beijing, which was previously viewed as the planet's dirtiest urban center.
This crisis in the city is resulting from a combination of various sources including transportation pollution, airborne particles, building projects, waste incineration and haze from agricultural fires in neighbouring areas of Punjab and Haryana.
In these regions, rural residents routinely ignite agricultural waste to expedite field preparation, generating dangerous smog that then gets trapped over the metropolitan area as cooler air sets in.
The economic and health toll on the roughly thirty-three million inhabitants calling home the Delhi area is significant, according to various research.
This pollution results in elevated rates of neurological, heart and circulatory and lung diseases, and can even lead to malignancies.
The pollution is projected to be accounting for 10,000 premature mortalities annually in the capital.