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Tuesday brought residents of this heavily contaminated metropolis found themselves breathing severely hazardous air that was classified as the "critical" level.

Extremely High Pollution Levels

Various sections of the capital registered an air quality index exceeding 500, which translates to ten times the recommended limit set by the global health authority.

In some locations, levels of PM2.5 and PM10 hit highs of 1800, equating to fifteen to twenty times exceeding safe levels.

Firecracker Ban and Recent Developments

Since 2020, officials had implemented a comprehensive restriction on the purchase and ignition of fireworks during the Festival of Lights due to their major role to the hazardous haze that engulfs the city as winter sets in.

Nevertheless recently, the recently formed regional leadership appealed to the supreme court to seek a easing of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – previously doubted by environmental experts as being only about 30% reduced emissions – as a compromise between "heritage and ecological concerns".

Court Verdict and Reality

Much to the frustration of environmental and health campaigners, judicial authorities agreed to the proposal, mandating that environmentally conscious fireworks could be ignited during limited time windows throughout the celebrations.

Throughout the festival evening, there was extensive disregard of the regulated periods across the metropolis, with minimal regulation regarding whether the fireworks being used were actually the eco-friendly version.

Numerous recording stations throughout Delhi registered pollution reaching highest levels around midnight to the most severe readings seen during the festival in at least recent memory.

Regional Consequences

The proliferation of pyrotechnics during Diwali also sparked a blame game with adjacent Pakistan, with authorities in Pakistani the Punjab region pointing to declining atmospheric conditions in their urban centers on pollutants coming from across the border following the festivities.

Persistent Pollution Problem

The dangerously high readings of air contamination in the city have persisted as a serious issue for over a decade and a half, with the situation continuing to worsen.

Near Diwali, the concentration of toxic particulate matter in the air has been documented to spike to significantly exceeding the worst readings ever recorded in Beijing, which was previously regarded as the globally most contaminated metropolis.

Diverse Contamination Sources

The situation in the city is resulting from a convergence of different contributors including heavy vehicle emissions, dust, construction activities, rubbish burning and haze from crop residue ignition in neighbouring states of farming communities.

Throughout these areas, rural residents illegally set their fields on fire to clear them quickly, creating dangerous smog that remains stagnant over the city as winter air sets in.

Public Health and Financial Impact

Public health and economic toll on the nearly 33 million residents living in the capital region is significant, according to various investigations.

The contaminated air results in increased incidence of neurological, heart and circulatory and breathing disorders, and can potentially cause malignancies.

Air quality crisis is calculated to be accounting for approximately 10k untimely fatalities annually in the city.