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As Tuesday dawned citizens of the world's most polluted city found themselves breathing extremely polluted air that fell into the "alarming" level.

Extremely High Pollution Readings

Several parts of Delhi registered an AQI above 500, which equals ten times the healthy level set by the World Health Organization.

Certain monitoring stations, concentrations of dangerous airborne particles soared to of 1,800, amounting to 15 to 20 times higher than healthy standards.

Pyrotechnics Restrictions and New Policy Shifts

Since 2020, authorities had implemented a total prohibition on the sale and use of pyrotechnics during celebrations due to their substantial impact to the dangerous haze that blankets the capital as colder weather sets in.

However in recent months, the recently formed city administration approached the judicial authority to propose a easing of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – which have been criticized by environmentalists as being only about 30% reduced emissions – as a balance between "tradition and ecological concerns".

Legal Decision and Reality

To the disappointment of public health and environmental campaigners, judges approved the appeal, stipulating that green firecrackers could be used during specific hours throughout the celebrations.

Throughout the festival evening, there was extensive disregard of the regulated periods across the city, with insufficient regulation regarding whether the fireworks being used were actually the supposedly greener version.

Several air quality sensors throughout the city registered contamination peaking around midnight to the most severe measurements recorded during celebrations in at least three years.

Regional Implications

The widespread use of pyrotechnics during Diwali also initiated a dispute with bordering the neighboring country, with authorities in Pakistani Punjab province partly blaming declining air quality in Lahore on hazardous particles coming from India following the festivities.

Chronic Pollution Problem

Extremely elevated readings of pollution in Delhi have remained as a major challenge for fifteen-plus years, with the condition gradually deteriorating.

During Diwali, the levels of dangerous particulate matter in the environment has been documented to spike to seventy percent above the worst readings ever measured in the Chinese city, which was formerly viewed as the globally most contaminated metropolis.

Diverse Pollution Factors

This crisis in the capital is resulting from a mix of various sources including transportation pollution, construction debris, construction activities, garbage fires and smoke from crop residue ignition in adjacent regions of farming communities.

Within these states, farmers illegally set their fields on fire to prepare for next season, generating toxic pollution that then gets trapped over the capital as colder air arrives.

Health and Economic Consequences

Both financial and medical toll on the approximately 33 million inhabitants living in the metropolitan zone is enormous, according to various studies.

These hazardous conditions leads to increased incidence of neurological, cardiovascular and respiratory disorders, and can potentially cause malignancies.

The pollution is projected to be accounting for 10,000 early fatalities annually in the capital.