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On Tuesday morning inhabitants of this heavily contaminated metropolis were faced with exposed to severely hazardous air that fell into the "alarming" category.

Record-Breaking Air Quality Readings

Various sections of Delhi showed an air quality index exceeding 500, which represents 10x the safe threshold recommended by the global health authority.

Certain monitoring stations, levels of PM2.5 and PM10 hit highs of 1,800, amounting to 15-20x exceeding safe limits.

Fireworks Restrictions and New Policy Shifts

Since 2020, officials had maintained a total prohibition on the sale and use of pyrotechnics during the Festival of Lights due to their significant contribution to the hazardous haze that covers the metropolis as colder weather approaches.

Nevertheless in recent months, the newly elected local leadership appealed to the judicial authority to seek a relaxation of the prohibition.

The suggestion was allowing "eco-friendly fireworks" – previously criticized by environmentalists as being only about 30% less polluting – as a balance between "cultural practices and public health".

Legal Decision and Implementation

Much to the frustration of public health and environmental campaigners, judicial authorities approved the request, mandating that eco-friendly pyrotechnics could be used during designated time windows throughout the Diwali.

During the celebrations, there was extensive disregard of the designated hours across the capital, with minimal monitoring regarding whether the fireworks being used were actually the eco-friendly type.

Many monitoring devices throughout the city registered contamination reaching highest levels around the night hours to some of the worst measurements seen during Diwali in at least three years.

International Effects

Extensive ignition of pyrotechnics during Diwali also initiated a controversy with neighbouring the neighboring country, with authorities in Pakistani the Punjab region partially attributing worsening air quality in their urban centers on hazardous particles originating in neighboring India following the celebrations.

Persistent Environmental Problem

Alarmingly severe concentrations of pollution in Delhi have persisted as a significant issue for over a decade and a half, with the situation showing no improvement.

During the festival period, the amount of hazardous airborne contaminants in the environment has been observed to increase dramatically to 70% higher the peak records ever measured in Beijing, which was formerly considered as the globally most contaminated urban center.

Multiple Pollution Sources

The problem in the capital is attributed to a convergence of multiple factors including automobile exhaust, dust, building projects, rubbish burning and pollutants from farm burning in nearby regions of farming communities.

In these regions, rural residents regularly ignite agricultural waste to prepare for next season, generating toxic pollution that becomes contained over the metropolitan area as cooler air descends.

Public Health and Economic Toll

The economic and health impact on the approximately 33 million people living in the metropolitan zone is substantial, according to multiple investigations.

These hazardous conditions causes increased incidence of neurological, heart and circulatory and breathing diseases, and can result in cancer.

The pollution is estimated to be accounting for 10,000 early deaths each year in the capital.