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On Tuesday morning inhabitants of this heavily contaminated metropolis found themselves exposed to severely hazardous air that registered in the "critical" level.

Extremely High Air Quality Readings

Various sections of Delhi showed an pollution measurement above 500, which equals ten times the healthy level set by the WHO.

Particular areas, concentrations of PM2.5 and PM10 hit highs of 1,800, representing fifteen to twenty times exceeding healthy levels.

Pyrotechnics Ban and Recent Changes

For the past four years, the government had implemented a total prohibition on the purchase and ignition of fireworks during Diwali due to their significant contribution to the dangerous pollution that blankets the capital as the cold season sets in.

Yet recently, the current regional government appealed to the judicial authority to propose a modification of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – previously doubted by environmental experts as being only about 30% lower impact – as a balance between "heritage and ecological concerns".

Court Verdict and Implementation

To the disappointment of medical and ecological advocates, the court complied with the appeal, specifying that environmentally conscious fireworks could be ignited during designated periods throughout the festival.

On Monday night, there was considerable flouting of the designated hours across the metropolis, with minimal regulation regarding whether the firecrackers being used were actually the supposedly greener version.

Several air quality sensors throughout the capital registered contamination peaking around midnight to some of the worst readings seen during the festival in at least three years.

International Effects

Extensive ignition of firecrackers during Diwali also initiated a blame game with adjacent the neighboring country, with authorities in Pakistan's the Punjab region pointing to deteriorating atmospheric conditions in the city of Lahore on contaminants coming from neighboring India following the events.

Long-Standing Environmental Issue

Extremely elevated levels of atmospheric toxins in the city have remained as a significant issue for over a decade and a half, with the problem continuing to worsen.

During Diwali, the amount of toxic particles in the air has been documented to increase dramatically to significantly exceeding the worst records ever documented in Beijing, which was previously regarded as the globally most contaminated metropolis.

Diverse Pollution Contributors

The situation in the capital is resulting from a mix of different contributors including automobile exhaust, airborne particles, building projects, waste incineration and haze from agricultural fires in nearby states of Punjab and Haryana.

In these regions, agricultural workers regularly burn crop residue to clear them quickly, creating hazardous haze that remains stagnant over the metropolitan area as cooler air arrives.

Public Health and Financial Toll

The economic and health impact on the roughly thirty-three million inhabitants living in the capital region is significant, according to various investigations.

The contaminated air leads to increased incidence of neurological, cardiovascular and lung disorders, and can even lead to oncological diseases.

The pollution is calculated to be responsible for 10,000 early mortalities per year in the capital.