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On Tuesday morning inhabitants of the world's most polluted city were faced with breathing extremely polluted air that registered in the "alarming" range.

Alarming Air Quality Levels

Multiple areas of Delhi recorded an pollution measurement exceeding 500, which translates to ten times the safe limit recommended by the World Health Organization.

In some locations, concentrations of PM2.5 and PM10 reached peaks of 1800, amounting to 15-20x above safe levels.

Firecracker Prohibition and New Policy Shifts

Beginning in 2020, authorities had maintained a comprehensive restriction on the sale and use of pyrotechnics during Diwali due to their substantial impact to the hazardous haze that covers the capital as winter sets in.

Nevertheless recently, the recently formed local leadership approached the judicial authority to seek a easing of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – historically criticized by environmental experts as being only approximately one-third reduced emissions – as a balance between "tradition and public health".

Court Verdict and Implementation

To the disappointment of environmental and health advocates, judicial authorities complied with the appeal, stipulating that green firecrackers could be used during designated periods throughout the Diwali.

Throughout the festival evening, there was considerable disregard of the designated hours across the city, with little monitoring regarding whether the firecrackers being used were actually the more environmentally friendly version.

Several air quality sensors throughout the city recorded contamination spiking around midnight to the most severe levels seen during the festival in at least the past three years.

Regional Implications

Extensive ignition of pyrotechnics during the festival also initiated a controversy with adjacent Pakistan, with representatives in Pakistan's Punjab province pointing to worsening air quality in their urban centers on contaminants originating in across the border following the events.

Persistent Environmental Problem

Alarmingly severe levels of atmospheric toxins in the city have remained as a significant issue for more than 15 years, with the situation continuing to worsen.

Around the festival period, the levels of toxic airborne contaminants in the air has been observed to shoot up to significantly exceeding the worst levels ever documented in China's capital, which was previously considered as the planet's dirtiest urban center.

Multiple Contamination Factors

The situation in the capital is attributed to a mix of multiple factors including transportation pollution, dust, construction activities, waste incineration and smoke from agricultural fires in nearby areas of Punjab and Haryana.

Within these states, rural residents illegally burn crop residue to prepare for next season, creating toxic pollution that remains stagnant over the city as winter air arrives.

Medical and Economic Toll

Both financial and medical toll on the roughly thirty-three million residents residing in the Delhi area is enormous, according to multiple investigations.

This pollution causes elevated rates of neurological, cardiovascular and lung disorders, and can potentially cause cancer.

Air quality crisis is estimated to be causing 10,000 untimely mortalities per year in the capital.