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As Tuesday dawned inhabitants of the world's most polluted city encountered inhaling severely hazardous air that registered in the "critical" category.

Extremely High Air Quality Measurements

Several parts of the capital recorded an air quality index above 500, which represents ten times the healthy limit set by the global health authority.

In some locations, readings of toxic particulate matter soared to of 1,800, representing 15 to 20 times above healthy levels.

Fireworks Ban and Recent Policy Shifts

Since 2020, officials had implemented a complete ban on the purchase and ignition of fireworks during Diwali due to their major role to the hazardous smog that covers the city as the cold season sets in.

Yet in recent months, the recently formed city leadership appealed to the judicial authority to propose a modification of the ban.

The suggestion was allowing "green crackers" – historically criticized by environmentalists as being only roughly 30 percent reduced emissions – as a middle ground between "heritage and environment".

Judicial Ruling and Enforcement

Much to the frustration of medical and ecological activists, judicial authorities approved the proposal, stipulating that eco-friendly pyrotechnics could be ignited during specific time windows throughout the festival.

During the celebrations, there was widespread violation of the time restrictions across the metropolis, with minimal regulation regarding whether the firecrackers being used were actually the more environmentally friendly type.

Many air quality sensors throughout Delhi recorded pollution reaching highest levels around late evening to the most severe measurements recorded during the festival in at least the past three years.

International Implications

The widespread use of firecrackers during the celebrations also initiated a blame game with bordering the neighboring country, with representatives in Pakistan's Punjab province pointing to declining pollution levels in the city of Lahore on hazardous particles traveling from across the border following the celebrations.

Long-Standing Pollution Issue

Alarmingly severe readings of atmospheric toxins in the capital have remained as a significant issue for more than 15 years, with the situation continuing to worsen.

During the festival period, the amount of toxic particles in the atmosphere has been documented to shoot up to significantly exceeding the most severe readings ever documented in the Chinese city, which was once viewed as the world's most polluted metropolis.

Multiple Contamination Factors

The situation in Delhi is attributed to a combination of various sources including automobile exhaust, construction debris, development work, waste incineration and haze from agricultural fires in neighbouring regions of farming communities.

Within these states, agricultural workers illegally ignite agricultural waste to clear them quickly, producing hazardous pollution that remains stagnant over the capital as colder air sets in.

Public Health and Financial Impact

Public health and economic consequences on the roughly thirty-three million inhabitants calling home the Delhi area is enormous, according to various research.

The contaminated air results in high levels of nervous system, cardiovascular and lung disorders, and can result in malignancies.

The pollution is calculated to be causing approximately 10k untimely deaths annually in Delhi.