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As Tuesday dawned residents of this heavily contaminated metropolis found themselves exposed to dangerously toxic air that was classified as the "severe" level.

Alarming Air Quality Readings

Multiple areas of the capital showed an pollution measurement exceeding 500, which represents 10x the healthy limit recommended by the World Health Organization.

In some locations, concentrations of dangerous airborne particles reached peaks of 1,800, representing fifteen to twenty times exceeding safe limits.

Fireworks Ban and Current Policy Shifts

Since 2020, authorities had implemented a total prohibition on the sale and use of pyrotechnics during celebrations due to their significant contribution to the hazardous pollution that covers the city as the cold season approaches.

However recently, the recently formed city administration petitioned the supreme court to request a relaxation of the ban.

The suggestion was allowing "green crackers" – previously doubted by environmental experts as being only about 30% lower impact – as a balance between "cultural practices and environment".

Legal Decision and Enforcement

Despite concerns of public health and environmental activists, judicial authorities approved the request, mandating that eco-friendly pyrotechnics could be set off during limited hours throughout the Diwali.

Throughout the festival evening, there was widespread disregard of the designated hours across the city, with minimal enforcement regarding whether the firecrackers being used were actually the more environmentally friendly type.

Numerous monitoring devices throughout the capital showed air quality reaching highest levels around the night hours to some of the worst readings observed during the festival in at least recent memory.

International Consequences

Extensive ignition of firecrackers during the festival also initiated a blame game with neighbouring Pakistan, with officials in Pakistani the Punjab region partially attributing deteriorating atmospheric conditions in their urban centers on pollutants originating in across the border following the events.

Chronic Pollution Issue

Alarmingly severe readings of pollution in the capital have persisted as a significant problem for more than 15 years, with the problem gradually deteriorating.

During the festival period, the levels of hazardous airborne contaminants in the environment has been found to increase dramatically to seventy percent above the most severe levels ever recorded in the Chinese city, which was formerly considered as the world's most polluted urban center.

Multiple Contamination Contributors

The situation in the city is caused by a combination of various sources including transportation pollution, dust, building projects, rubbish burning and haze from agricultural fires in adjacent regions of Punjab and Haryana.

In these regions, agricultural workers illegally burn crop residue to prepare for next season, generating hazardous haze that becomes contained over the city as winter air descends.

Medical and Financial Impact

The economic and health toll on the approximately 33 million people living in the metropolitan zone is significant, according to multiple studies.

This pollution leads to high levels of nervous system, cardiovascular and breathing conditions, and can even lead to cancer.

Air quality crisis is calculated to be causing ten thousand untimely fatalities each year in the city.