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As Tuesday dawned citizens of the planet's dirtiest urban center encountered inhaling severely hazardous air that fell into the "critical" level.

Alarming Pollution Measurements

Multiple areas of the city showed an AQI above 500, which represents a tenfold increase over the recommended limit established by the WHO.

In some locations, readings of dangerous airborne particles hit highs of 1,800, amounting to 15-20x exceeding acceptable limits.

Pyrotechnics Restrictions and Current Policy Shifts

Since 2020, officials had maintained a comprehensive restriction on the purchase and ignition of firecrackers during the Festival of Lights due to their substantial impact to the deadly smog that engulfs the capital as the cold season begins.

However earlier this year, the current city leadership approached the supreme court to seek a relaxation of the prohibition.

Officials advocated for allowing "eco-friendly fireworks" – which have been criticized by environmental experts as being only roughly 30 percent reduced emissions – as a middle ground between "tradition and ecological concerns".

Judicial Verdict and Implementation

Much to the frustration of environmental and health activists, the court complied with the proposal, specifying that environmentally conscious fireworks could be used during designated hours throughout the Diwali.

On Monday night, there was considerable disregard of the designated hours across the capital, with little enforcement regarding whether the firecrackers being used were actually the eco-friendly variety.

Numerous recording stations throughout Delhi showed contamination reaching highest levels around the night hours to extremely hazardous readings recorded during the festival in at least recent memory.

Cross-Border Effects

Extensive ignition of pyrotechnics during the festival also triggered a blame game with adjacent the neighboring country, with officials in Pakistani the Punjab region partially attributing declining air quality in Lahore on pollutants originating in across the border following the festivities.

Chronic Pollution Issue

Extremely elevated readings of pollution in the capital have remained as a significant problem for over a decade and a half, with the problem showing no improvement.

During Diwali, the levels of hazardous particles in the environment has been observed to spike to 70% higher the worst levels ever documented in the Chinese city, which was previously considered as the world's most polluted urban center.

Multiple Pollution Sources

The problem in Delhi is attributed to a convergence of various sources including transportation pollution, dust, development work, waste incineration and haze from agricultural fires in adjacent states of neighboring agricultural zones.

In these regions, rural residents regularly set their fields on fire to expedite field preparation, producing toxic pollution that becomes contained over the city as colder air arrives.

Medical and Economic Toll

Both financial and medical toll on the nearly 33 million people residing in the Delhi area is significant, according to multiple studies.

This pollution leads to elevated rates of neurological, cardiovascular and respiratory diseases, and can even lead to cancer.

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