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On Tuesday morning inhabitants of the world's most polluted city found themselves breathing severely hazardous air that fell into the "alarming" category.

Extremely High Air Quality Measurements

Various sections of the city recorded an pollution measurement over 500, which equals 10x the recommended threshold established by the WHO.

In some locations, levels of toxic particulate matter soared to of 1800, equating to 15 to 20 times exceeding acceptable standards.

Pyrotechnics Prohibition and Recent Changes

Beginning in 2020, the government had implemented a comprehensive restriction on the purchase and ignition of firecrackers during celebrations due to their significant contribution to the dangerous haze that engulfs the metropolis as winter sets in.

Nevertheless recently, the recently formed regional government appealed to the highest court to propose a modification of the prohibition.

The suggestion was allowing "eco-friendly fireworks" – historically doubted by environmental experts as being only approximately one-third lower impact – as a balance between "heritage and public health".

Legal Ruling and Reality

To the disappointment of environmental and health activists, the court complied with the request, specifying that eco-friendly pyrotechnics could be ignited during limited hours throughout the Diwali.

During the celebrations, there was extensive flouting of the designated hours across the city, with minimal enforcement regarding whether the fireworks being used were actually the eco-friendly type.

Many recording stations throughout Delhi registered contamination reaching highest levels around late evening to the most severe levels seen during Diwali in at least recent memory.

Cross-Border Consequences

Extensive ignition of firecrackers during the festival also sparked a blame game with adjacent the neighboring country, with representatives in Pakistan's Punjab province partially attributing worsening air quality in the city of Lahore on pollutants traveling from neighboring India following the celebrations.

Persistent Pollution Issue

Alarmingly severe concentrations of atmospheric toxins in Delhi have persisted as a major challenge for fifteen-plus years, with the situation gradually deteriorating.

During the festival period, the concentration of dangerous particles in the atmosphere has been found to shoot up to seventy percent above the peak levels ever documented in China's capital, which was formerly regarded as the world's most polluted urban center.

Multiple Pollution Factors

The situation in the capital is caused by a convergence of various sources including transportation pollution, construction debris, development work, rubbish burning and pollutants from crop residue ignition in adjacent regions of neighboring agricultural zones.

In these regions, agricultural workers illegally ignite agricultural waste to clear them quickly, producing dangerous haze that then gets trapped over the metropolitan area as winter air sets in.

Medical and Economic Toll

The economic and health consequences on the approximately 33 million inhabitants residing in the metropolitan zone is enormous, according to various investigations.

This pollution leads to elevated rates of nervous system, heart and circulatory and respiratory diseases, and can potentially cause oncological diseases.

Air quality crisis is estimated to be accounting for approximately 10k untimely fatalities annually in Delhi.