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As Tuesday dawned inhabitants of the world's most polluted city were faced with exposed to extremely polluted air that fell into the "alarming" level.

Extremely High Air Quality Measurements

Various sections of Delhi recorded an AQI over 500, which equals ten times the safe level recommended by the WHO.

Certain monitoring stations, levels of dangerous airborne particles hit highs of eighteen hundred, representing fifteen to twenty times exceeding safe levels.

Firecracker Prohibition and Current Changes

Since 2020, authorities had implemented a total prohibition on the purchase and ignition of pyrotechnics during the Festival of Lights due to their substantial impact to the deadly pollution that blankets the city as winter approaches.

Nevertheless earlier this year, the recently formed local leadership approached the highest court to seek a modification of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – historically criticized by environmental experts as being only approximately one-third reduced emissions – as a balance between "heritage and public health".

Court Ruling and Enforcement

Despite concerns of environmental and health activists, judicial authorities approved the appeal, mandating that green firecrackers could be ignited during specific time windows throughout the celebrations.

On Monday night, there was considerable disregard of the designated hours across the metropolis, with minimal regulation regarding whether the pyrotechnics being used were actually the more environmentally friendly variety.

Several monitoring devices throughout Delhi recorded air quality reaching highest levels around the night hours to the most severe measurements observed during the festival in at least three years.

Cross-Border Effects

Extensive ignition of pyrotechnics during Diwali also triggered a dispute with bordering the neighboring country, with officials in Pakistani Punjab partially attributing deteriorating atmospheric conditions in the city of Lahore on hazardous particles originating in neighboring India following the celebrations.

Persistent Environmental Issue

Alarmingly severe levels of pollution in the city have persisted as a major challenge for more than 15 years, with the problem gradually deteriorating.

During celebratory seasons, the levels of hazardous particulate matter in the atmosphere has been documented to increase dramatically to 70% higher the peak levels ever measured in China's capital, which was previously viewed as the planet's dirtiest urban center.

Multiple Contamination Factors

The situation in the capital is caused by a combination of different contributors including automobile exhaust, airborne particles, development work, rubbish burning and smoke from crop residue ignition in neighbouring states of neighboring agricultural zones.

In these regions, farmers routinely ignite agricultural waste to clear them quickly, generating dangerous pollution that remains stagnant over the city as winter air descends.

Public Health and Economic Toll

The economic and health impact on the approximately 33 million people living in the Delhi area is significant, according to numerous research.

These hazardous conditions results in elevated rates of nervous system, heart and circulatory and breathing conditions, and can potentially cause cancer.

Environmental contamination is calculated to be responsible for approximately 10k untimely deaths per year in the capital.