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Tuesday brought citizens of this heavily contaminated metropolis encountered exposed to severely hazardous air that was classified as the "alarming" category.

Alarming Air Quality Levels

Multiple areas of the capital registered an AQI exceeding 500, which equals a tenfold increase over the recommended limit set by the global health authority.

In some locations, levels of toxic particulate matter soared to of 1800, representing 15-20x above safe levels.

Pyrotechnics Prohibition and Recent Policy Shifts

Beginning in 2020, the government had implemented a total prohibition on the purchase and ignition of pyrotechnics during the Festival of Lights due to their significant contribution to the deadly smog that covers the city as colder weather begins.

Yet earlier this year, the current regional administration appealed to the highest court to propose a easing of the ban.

The suggestion was allowing "eco-friendly fireworks" – previously criticized by environmentalists as being only approximately one-third lower impact – as a middle ground between "heritage and environment".

Legal Decision and Enforcement

Despite concerns of medical and ecological activists, judges agreed to the proposal, mandating that green firecrackers could be ignited during limited hours throughout the celebrations.

During the celebrations, there was widespread flouting of the time restrictions across the capital, with little enforcement regarding whether the fireworks being used were actually the more environmentally friendly variety.

Many monitoring devices throughout Delhi recorded contamination reaching highest levels around the night hours to the most severe levels recorded during celebrations in at least the past three years.

International Effects

The widespread use of firecrackers during the festival also sparked a dispute with bordering Pakistan, with officials in Pakistan's Punjab province partially attributing declining pollution levels in Lahore on hazardous particles traveling from India following the celebrations.

Long-Standing Environmental Crisis

The dangerously high readings of pollution in Delhi have continued as a significant problem for over a decade and a half, with the problem showing no improvement.

Near celebratory seasons, the levels of dangerous particulate matter in the atmosphere has been found to increase dramatically to significantly exceeding the peak records ever measured in Beijing, which was formerly viewed as the globally most contaminated city.

Various Pollution Factors

The situation in Delhi is resulting from a convergence of multiple factors including automobile exhaust, airborne particles, construction activities, garbage fires and smoke from crop residue ignition in neighbouring areas of farming communities.

Throughout these areas, farmers regularly ignite agricultural waste to clear them quickly, producing toxic pollution that remains stagnant over the city as cooler air arrives.

Public Health and Economic Impact

Public health and economic toll on the approximately 33 million inhabitants calling home the metropolitan zone is enormous, according to multiple studies.

These hazardous conditions causes elevated rates of neurological, heart and circulatory and breathing conditions, and can result in oncological diseases.

Air quality crisis is projected to be causing ten thousand premature deaths annually in the capital.