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

Extremely High Air Quality Levels

Multiple areas of Delhi registered an air quality index over 500, which equals 10x the safe level set by the WHO.

Particular areas, levels of dangerous airborne particles reached peaks of 1800, representing 15 to 20 times higher than safe limits.

Pyrotechnics Prohibition and Recent Developments

Beginning in 2020, authorities had maintained a comprehensive restriction on the distribution and bursting of firecrackers during Diwali due to their substantial impact to the hazardous haze that engulfs the metropolis as winter begins.

However recently, the recently formed regional government approached the supreme court to propose a easing of the prohibition.

The suggestion was allowing "green crackers" – previously questioned by environmental experts as being only approximately one-third less polluting – as a middle ground between "heritage and public health".

Legal Decision and Enforcement

Much to the frustration of public health and environmental campaigners, judicial authorities agreed to the request, mandating that eco-friendly pyrotechnics could be set off during specific periods throughout the festival.

Throughout the festival evening, there was extensive flouting of the time restrictions across the metropolis, with little monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Many monitoring devices throughout Delhi recorded contamination peaking around late evening to the most severe readings recorded during the festival in at least three years.

Cross-Border Consequences

The proliferation of fireworks during the celebrations also sparked a blame game with adjacent Pakistan, with representatives in Pakistani the Punjab region pointing to worsening pollution levels in the city of Lahore on hazardous particles coming from across the border following the celebrations.

Chronic Environmental Issue

Alarmingly severe readings of pollution in Delhi have persisted as a significant problem for over a decade and a half, with the problem continuing to worsen.

Around Diwali, the amount of toxic airborne contaminants in the atmosphere has been found to shoot up to seventy percent above the most severe readings ever documented in Beijing, which was previously viewed as the world's most polluted urban center.

Various Contamination Sources

The situation in the capital is caused by a mix of various sources including heavy vehicle emissions, airborne particles, construction activities, rubbish burning and haze from crop residue ignition in nearby areas of farming communities.

In these regions, agricultural workers regularly burn crop residue to clear them quickly, producing dangerous haze that becomes contained over the capital as colder air descends.

Health and Financial Impact

The economic and health impact on the approximately 33 million residents residing in the Delhi area is enormous, according to multiple studies.

The contaminated air results in elevated rates of neurological, cardiovascular and lung conditions, and can potentially cause oncological diseases.

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