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On Tuesday morning citizens of this heavily contaminated metropolis encountered breathing severely hazardous air that was classified as the "alarming" level.

Alarming Air Quality Readings

Several parts of the city registered an AQI exceeding 500, which equals 10x the recommended limit set by the global health authority.

Certain monitoring stations, concentrations of toxic particulate matter hit highs of 1,800, representing fifteen to twenty times above healthy levels.

Firecracker Ban and Recent Changes

Since 2020, the government had enforced a comprehensive restriction on the sale and use of fireworks during Diwali due to their significant contribution to the dangerous haze that blankets the city as the cold season begins.

Yet in recent months, the newly elected regional leadership petitioned the judicial authority to seek a relaxation of the ban.

They proposed allowing "green crackers" – previously doubted by environmentalists as being only approximately one-third lower impact – as a compromise between "cultural practices and public health".

Judicial Ruling and Implementation

Much to the frustration of medical and ecological advocates, judges approved the proposal, stipulating that green firecrackers could be set off during specific hours throughout the Diwali.

During the celebrations, there was extensive violation of the designated hours across the capital, with minimal monitoring regarding whether the pyrotechnics being used were actually the supposedly greener version.

Many air quality sensors throughout the capital registered pollution spiking around midnight to the most severe levels seen during celebrations in at least the past three years.

International Implications

The widespread use of firecrackers during the festival also sparked a dispute with adjacent Pakistan, with authorities in Pakistani Punjab province partly blaming declining pollution levels in the city of Lahore on hazardous particles coming from across the border following the festivities.

Long-Standing Pollution Issue

The dangerously high concentrations of pollution in the capital have persisted as a major problem for over a decade and a half, with the condition gradually deteriorating.

Near Diwali, the levels of dangerous airborne contaminants in the atmosphere has been found to increase dramatically to 70% higher the worst levels ever documented in Beijing, which was previously regarded as the planet's dirtiest urban center.

Various Contamination Factors

The situation in the capital is resulting from a convergence of different contributors including heavy vehicle emissions, construction debris, development work, garbage fires and smoke from crop residue ignition in nearby regions of Punjab and Haryana.

Throughout these areas, farmers regularly burn crop residue to clear them quickly, creating dangerous haze that becomes contained over the metropolitan area as winter air descends.

Medical and Financial Impact

The economic and health consequences on the nearly 33 million residents residing in the Delhi area is enormous, according to various investigations.

These hazardous conditions leads to elevated rates of nervous system, heart and circulatory and breathing conditions, and can even lead to oncological diseases.

Environmental contamination is projected to be accounting for 10,000 premature mortalities each year in the capital.