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As Tuesday dawned citizens of this heavily contaminated metropolis were faced with inhaling extremely polluted air that was classified as the "severe" range.

Extremely High Air Quality Levels

Various sections of the capital registered an air quality index exceeding 500, which equals 10x the safe threshold established by the WHO.

Particular areas, concentrations of toxic particulate matter reached peaks of 1800, equating to 15-20x higher than safe levels.

Pyrotechnics Prohibition and Recent Policy Shifts

Beginning in 2020, authorities had maintained a complete ban on the purchase and ignition of firecrackers during the Festival of Lights due to their substantial impact to the hazardous smog that engulfs the capital as winter sets in.

Yet in recent months, the current city leadership approached the highest court to request a easing of the prohibition.

Officials advocated for allowing "green crackers" – previously questioned by environmental experts as being only about 30% reduced emissions – as a compromise between "tradition and environment".

Court Ruling and Implementation

To the disappointment of environmental and health activists, judges agreed to the proposal, specifying that green firecrackers could be used during designated time windows throughout the celebrations.

On Monday night, there was considerable flouting of the regulated periods across the city, with insufficient monitoring regarding whether the fireworks being used were actually the supposedly greener variety.

Many monitoring devices throughout the city recorded air quality peaking around midnight to the most severe measurements recorded during the festival in at least the past three years.

International Effects

The proliferation of firecrackers during the celebrations also triggered a dispute with adjacent Pakistan, with officials in Pakistani Punjab partly blaming worsening atmospheric conditions in Lahore on contaminants coming from across the border following the events.

Long-Standing Pollution Problem

Alarmingly severe readings of atmospheric toxins in Delhi have persisted as a significant problem for over a decade and a half, with the situation gradually deteriorating.

Around celebratory seasons, the concentration of toxic particles in the environment has been observed to shoot up to seventy percent above the peak records ever documented in China's capital, which was once viewed as the world's most polluted metropolis.

Diverse Contamination Sources

The problem in the city is attributed to a mix of various sources including transportation pollution, airborne particles, development work, waste incineration and smoke from farm burning in nearby states of Punjab and Haryana.

In these regions, farmers illegally ignite agricultural waste to prepare for next season, creating hazardous haze that then gets trapped over the city as cooler air sets in.

Medical and Economic Consequences

Both financial and medical impact on the approximately 33 million inhabitants living in the Delhi area is enormous, according to numerous investigations.

These hazardous conditions leads to high levels of neurological, cardiovascular and respiratory diseases, and can result in oncological diseases.

Environmental contamination is estimated to be accounting for ten thousand premature deaths each year in Delhi.