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On Tuesday morning inhabitants of this heavily contaminated metropolis encountered breathing dangerously toxic air that registered in the "severe" range.

Extremely High Air Quality Levels

Various sections of Delhi recorded an pollution measurement above 500, which translates to a tenfold increase over the recommended threshold set by the World Health Organization.

In some locations, concentrations of toxic particulate matter hit highs of eighteen hundred, representing fifteen to twenty times above healthy levels.

Firecracker Ban and Recent Changes

For the past four years, officials had implemented a complete ban on the distribution and bursting of firecrackers during the Festival of Lights due to their significant contribution to the deadly smog that blankets the capital as the cold season approaches.

Yet in recent months, the recently formed regional government petitioned the judicial authority to request a easing of the prohibition.

They proposed allowing "green crackers" – previously criticized by conservation groups as being only approximately one-third lower impact – as a balance between "tradition and public health".

Judicial Verdict and Enforcement

Despite concerns of public health and environmental campaigners, judges complied with the appeal, specifying that green firecrackers could be used during specific hours throughout the festival.

Throughout the festival evening, there was widespread violation of the regulated periods across the capital, with insufficient monitoring regarding whether the firecrackers being used were actually the more environmentally friendly type.

Numerous recording stations throughout the city recorded pollution reaching highest levels around late evening to the most severe measurements seen during the festival in at least three years.

International Consequences

The proliferation of firecrackers during the festival also sparked a dispute with bordering the neighboring country, with authorities in Pakistan's Punjab province partly blaming declining atmospheric conditions in Lahore on contaminants coming from neighboring India following the events.

Chronic Pollution Issue

The dangerously high concentrations of atmospheric toxins in the city have persisted as a significant challenge for more than 15 years, with the situation gradually deteriorating.

Around the festival period, the amount of toxic particles in the air has been observed to spike to seventy percent above the worst levels ever recorded in the Chinese city, which was once viewed as the planet's dirtiest metropolis.

Various Contamination Contributors

This crisis in the capital is resulting from a mix of various sources including transportation pollution, dust, construction activities, waste incineration and smoke from farm burning in nearby areas of farming communities.

Within these states, agricultural workers routinely set their fields on fire to prepare for next season, creating toxic pollution that becomes contained over the capital as colder air descends.

Medical and Economic Impact

Both financial and medical consequences on the nearly 33 million residents living in the metropolitan zone is enormous, according to multiple research.

This pollution results in high levels of nervous system, heart and circulatory and lung disorders, and can result in malignancies.

Environmental contamination is projected to be accounting for approximately 10k untimely fatalities each year in the capital.