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On Tuesday morning citizens of this heavily contaminated metropolis were faced with breathing extremely polluted air that fell into the "critical" level.

Extremely High Air Quality Readings

Various sections of Delhi showed an pollution measurement exceeding 500, which equals 10x the healthy limit established by the World Health Organization.

Certain monitoring stations, readings of PM2.5 and PM10 reached peaks of 1,800, amounting to 15-20x higher than safe limits.

Pyrotechnics Prohibition and New Developments

Beginning in 2020, authorities had implemented a total prohibition on the sale and use of pyrotechnics during the Festival of Lights due to their major role to the hazardous smog that engulfs the city as colder weather sets in.

However in recent months, the current regional administration petitioned the highest court to seek a relaxation of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously criticized by environmental experts as being only about 30% less polluting – as a balance between "tradition and environment".

Legal Ruling and Implementation

Much to the frustration of public health and environmental advocates, judges agreed to the request, mandating that eco-friendly pyrotechnics could be used during limited hours throughout the festival.

Throughout the festival evening, there was extensive flouting of the designated hours across the city, with minimal monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Numerous recording stations throughout the capital registered contamination reaching highest levels around midnight to some of the worst readings seen during celebrations in at least the past three years.

Cross-Border Consequences

The widespread use of firecrackers during the festival also triggered a blame game with bordering the neighboring country, with officials in Pakistan's Punjab partly blaming deteriorating pollution levels in the city of Lahore on contaminants traveling from neighboring India following the festivities.

Persistent Environmental Problem

Alarmingly severe readings of air contamination in Delhi have remained as a major issue for fifteen-plus years, with the problem gradually deteriorating.

During Diwali, the concentration of hazardous particulate matter in the atmosphere has been observed to shoot up to significantly exceeding the worst readings ever measured in the Chinese city, which was formerly viewed as the world's most polluted urban center.

Multiple Pollution Sources

The problem in the city is attributed to a combination of multiple factors including heavy vehicle emissions, dust, building projects, waste incineration and pollutants from agricultural fires in nearby states of farming communities.

Within these states, rural residents regularly set their fields on fire to clear them quickly, creating dangerous haze that becomes contained over the capital as winter air descends.

Health and Economic Consequences

The economic and health toll on the roughly thirty-three million people residing in the capital region is substantial, according to various investigations.

This pollution leads to increased incidence of nervous system, heart and circulatory and respiratory conditions, and can potentially cause malignancies.

Air quality crisis is projected to be causing approximately 10k untimely deaths each year in the capital.