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

Alarming Air Quality Measurements

Multiple areas of Delhi registered an air quality index exceeding 500, which translates to 10x the recommended threshold set by the World Health Organization.

Certain monitoring stations, readings of dangerous airborne particles reached peaks of 1800, representing fifteen to twenty times above healthy limits.

Fireworks Ban and New Changes

For the past four years, officials had maintained a complete ban on the purchase and ignition of pyrotechnics during the Festival of Lights due to their significant contribution to the hazardous smog that engulfs the capital as the cold season approaches.

However in recent months, the current regional government petitioned the judicial authority to seek a easing of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously questioned by conservation groups as being only approximately one-third less polluting – as a compromise between "heritage and environment".

Judicial Verdict and Implementation

Much to the frustration of public health and environmental advocates, the court complied with the request, mandating that green firecrackers could be used during specific hours throughout the festival.

During the celebrations, there was considerable disregard of the designated hours across the city, with minimal regulation regarding whether the firecrackers being used were actually the supposedly greener version.

Numerous recording stations throughout the city recorded contamination spiking around midnight to extremely hazardous readings recorded during Diwali in at least recent memory.

Cross-Border Effects

Extensive ignition of pyrotechnics during Diwali also initiated a dispute with adjacent the neighboring country, with authorities in Pakistan's Punjab pointing to worsening air quality in their urban centers on hazardous particles originating in neighboring India following the celebrations.

Long-Standing Environmental Problem

Alarmingly severe levels of atmospheric toxins in the city have continued as a serious problem for over a decade and a half, with the condition gradually deteriorating.

Around the festival period, the levels of dangerous airborne contaminants in the atmosphere has been found to spike to significantly exceeding the most severe readings ever documented in the Chinese city, which was formerly viewed as the globally most contaminated metropolis.

Multiple Pollution Contributors

The problem in the capital is attributed to a combination of different contributors including heavy vehicle emissions, construction debris, construction activities, garbage fires and pollutants from agricultural fires in neighbouring areas of farming communities.

Throughout these areas, farmers routinely burn crop residue to clear them quickly, generating hazardous smog that remains stagnant over the capital as winter air descends.

Health and Financial Toll

Public health and economic impact on the approximately 33 million people calling home the capital region is enormous, according to numerous research.

These hazardous conditions causes increased incidence of nervous system, cardiovascular and lung disorders, and can even lead to cancer.

The pollution is projected to be accounting for ten thousand early deaths annually in Delhi.