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As Tuesday dawned citizens of this heavily contaminated metropolis encountered breathing extremely polluted air that fell into the "critical" category.

Extremely High Pollution Levels

Various sections of the capital registered an AQI exceeding 500, which equals ten times the recommended level established by the WHO.

In some locations, levels of PM2.5 and PM10 reached peaks of 1,800, representing 15 to 20 times above safe standards.

Firecracker Prohibition and New Developments

Beginning in 2020, officials had enforced a complete ban on the distribution and bursting of fireworks during celebrations due to their significant contribution to the dangerous pollution that covers the capital as colder weather begins.

Yet recently, the newly elected city administration petitioned the judicial authority to propose a easing of the prohibition.

They proposed allowing "green crackers" – previously doubted by conservation groups as being only roughly 30 percent less polluting – as a balance between "tradition and environment".

Legal Ruling and Reality

To the disappointment of public health and environmental campaigners, judicial authorities approved the request, mandating that green firecrackers could be ignited during designated periods throughout the Diwali.

On Monday night, there was widespread violation of the time restrictions across the city, with insufficient monitoring regarding whether the fireworks being used were actually the supposedly greener version.

Several air quality sensors throughout the capital showed pollution peaking around the night hours to some of the worst readings recorded during Diwali in at least the past three years.

Regional Effects

The widespread use of firecrackers during the festival also triggered a controversy with neighbouring the neighboring country, with representatives in Pakistan's Punjab province pointing to declining atmospheric conditions in the city of Lahore on hazardous particles originating in neighboring India following the festivities.

Persistent Pollution Problem

The dangerously high readings of air contamination in Delhi have remained as a significant problem for over a decade and a half, with the condition continuing to worsen.

Near Diwali, the concentration of dangerous particles in the environment has been documented to shoot up to significantly exceeding the most severe records ever recorded in the Chinese city, which was formerly viewed as the planet's dirtiest metropolis.

Various Pollution Factors

The problem in the capital is attributed to a convergence of multiple factors including automobile exhaust, airborne particles, construction activities, garbage fires and smoke from crop residue ignition in nearby areas of Punjab and Haryana.

Throughout these areas, agricultural workers regularly burn crop residue to expedite field preparation, creating hazardous pollution that becomes contained over the metropolitan area as cooler air sets in.

Health and Economic Consequences

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

This pollution results in elevated rates of nervous system, heart and circulatory and respiratory disorders, and can potentially cause malignancies.

The pollution is projected to be responsible for approximately 10k early mortalities per year in the city.