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Tuesday brought inhabitants of the planet's dirtiest urban center encountered breathing dangerously toxic air that registered in the "alarming" level.

Extremely High Air Quality Readings

Several parts of the city recorded an pollution measurement exceeding 500, which translates to 10x the healthy level established by the WHO.

Certain monitoring stations, readings of PM2.5 and PM10 hit highs of 1,800, equating to 15-20x higher than healthy limits.

Firecracker Ban and Current Policy Shifts

For the past four years, the government had maintained a comprehensive restriction on the distribution and bursting of pyrotechnics during the Festival of Lights due to their major role to the deadly haze that covers the city as the cold season sets in.

Yet recently, the newly elected regional leadership appealed to the supreme court to propose a modification of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously criticized by conservation groups as being only approximately one-third reduced emissions – as a compromise between "cultural practices and ecological concerns".

Court Decision and Enforcement

Much to the frustration of medical and ecological campaigners, the court approved the request, mandating that environmentally conscious fireworks could be ignited during specific periods throughout the festival.

Throughout the festival evening, 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.

Numerous monitoring devices throughout Delhi registered contamination peaking around midnight to extremely hazardous levels recorded during Diwali in at least the past three years.

Regional Effects

The widespread use of firecrackers during the festival also triggered a dispute with adjacent the neighboring country, with officials in Pakistani Punjab pointing to worsening atmospheric conditions in their urban centers on pollutants originating in India following the celebrations.

Chronic Pollution Problem

The dangerously high concentrations of pollution in the capital have persisted as a serious problem for over a decade and a half, with the situation continuing to worsen.

During the festival period, the levels of dangerous particulate matter in the air has been found to spike to significantly exceeding the worst records ever measured in China's capital, which was once considered as the globally most contaminated metropolis.

Various Contamination Factors

The situation in Delhi is attributed to a mix of multiple factors including automobile exhaust, dust, construction activities, waste incineration and haze from crop residue ignition in neighbouring regions of farming communities.

Throughout these areas, agricultural workers regularly ignite agricultural waste to expedite field preparation, producing toxic pollution that then gets trapped over the capital as colder air arrives.

Health and Financial Consequences

Both financial and medical toll on the roughly thirty-three million inhabitants living in the Delhi area is substantial, according to numerous research.

This pollution causes increased incidence of nervous system, cardiovascular and lung conditions, and can potentially cause malignancies.

Environmental contamination is estimated to be causing 10,000 early deaths each year in Delhi.