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As Tuesday dawned inhabitants of this heavily contaminated metropolis encountered breathing extremely polluted air that registered in the "alarming" range.

Alarming Pollution Measurements

Several parts of the capital showed an AQI above 500, which equals ten times the recommended threshold established by the global health authority.

Particular areas, levels of PM2.5 and PM10 soared to of 1800, amounting to 15 to 20 times exceeding healthy standards.

Fireworks Ban and Recent Policy Shifts

Beginning in 2020, officials had implemented a total prohibition on the sale and use of firecrackers during Diwali due to their significant contribution to the hazardous haze that engulfs the city as the cold season approaches.

However earlier this year, the newly elected regional administration appealed to the highest court to seek a relaxation of the restrictions.

The suggestion was allowing "eco-friendly fireworks" – historically criticized by environmentalists as being only approximately one-third reduced emissions – as a middle ground between "heritage and public health".

Court Ruling and Enforcement

To the disappointment of public health and environmental advocates, judges approved the request, mandating that environmentally conscious fireworks could be ignited during specific periods throughout the Diwali.

During the celebrations, there was widespread disregard of the time restrictions across the capital, with insufficient enforcement regarding whether the fireworks being used were actually the more environmentally friendly version.

Numerous air quality sensors throughout Delhi showed air quality spiking around late evening to extremely hazardous levels recorded during Diwali in at least recent memory.

Regional Effects

The proliferation of pyrotechnics during Diwali also sparked a dispute with bordering the neighboring country, with representatives in Pakistan's Punjab pointing to declining air quality in the city of Lahore on contaminants originating in across the border following the festivities.

Chronic Environmental Crisis

The dangerously high concentrations of pollution in the capital have remained as a major problem for more than 15 years, with the problem gradually deteriorating.

During Diwali, the levels of hazardous particles in the air has been observed to spike to 70% higher the most severe records ever measured in Beijing, which was once viewed as the globally most contaminated metropolis.

Multiple Pollution Contributors

This crisis in the city is caused by a combination of different contributors including heavy vehicle emissions, dust, construction activities, waste incineration and pollutants from agricultural fires in nearby areas of Punjab and Haryana.

Within these states, rural residents illegally set their fields on fire to expedite field preparation, producing dangerous smog that becomes contained over the city as colder air arrives.

Medical and Economic Consequences

Public health and economic impact on the approximately 33 million people living in the metropolitan zone is enormous, according to numerous studies.

The contaminated air causes increased incidence of nervous system, heart and circulatory and lung disorders, and can even lead to cancer.

Environmental contamination is projected to be causing approximately 10k early fatalities each year in the capital.