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Tuesday brought residents of the world's most polluted city encountered exposed to dangerously toxic air that registered in the "alarming" category.

Alarming Air Quality Levels

Several parts of the capital showed an pollution measurement over 500, which translates to 10x the safe threshold set by the WHO.

Certain monitoring stations, readings of toxic particulate matter hit highs of 1800, representing fifteen to twenty times above healthy levels.

Firecracker Prohibition and New Developments

For the past four years, officials had maintained a total prohibition on the sale and use of fireworks during celebrations due to their significant contribution to the dangerous pollution that engulfs the capital as colder weather approaches.

Yet in recent months, the newly elected local leadership appealed to the supreme court to propose a relaxation of the ban.

They proposed allowing "environmentally conscious pyrotechnics" – previously questioned by conservation groups as being only approximately one-third less polluting – as a middle ground between "tradition and environment".

Court Verdict and Implementation

Despite concerns of environmental and health campaigners, judges agreed to the request, mandating that eco-friendly pyrotechnics could be used during designated periods throughout the Diwali.

Throughout the festival evening, there was considerable violation of the designated hours across the capital, with minimal enforcement regarding whether the fireworks being used were actually the more environmentally friendly variety.

Numerous monitoring devices throughout the capital showed pollution reaching highest levels around late evening to extremely hazardous readings observed during celebrations in at least three years.

International Consequences

The widespread use of fireworks during Diwali also initiated a blame game with neighbouring Pakistan, with representatives in Pakistani the Punjab region partially attributing deteriorating air quality in their urban centers on contaminants originating in neighboring India following the festivities.

Long-Standing Pollution Issue

The dangerously high concentrations of air contamination in the city have continued as a major issue for fifteen-plus years, with the problem continuing to worsen.

During Diwali, the amount of dangerous particulate matter in the atmosphere has been found to increase dramatically to significantly exceeding the worst readings ever recorded in Beijing, which was once regarded as the globally most contaminated urban center.

Various Pollution Contributors

This crisis in the city is caused by a convergence of different contributors including transportation pollution, construction debris, development work, waste incineration and haze from crop residue ignition in neighbouring states of Punjab and Haryana.

Throughout these areas, agricultural workers routinely burn crop residue to clear them quickly, producing toxic pollution that becomes contained over the metropolitan area as winter air sets in.

Medical and Economic Impact

The economic and health consequences on the approximately 33 million inhabitants living in the metropolitan zone is significant, according to numerous investigations.

This pollution leads to increased incidence of nervous system, cardiovascular and respiratory disorders, and can even lead to oncological diseases.

Environmental contamination is estimated to be responsible for ten thousand premature deaths per year in the capital.