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As Tuesday dawned inhabitants of the planet's dirtiest urban center found themselves breathing extremely polluted air that fell into the "severe" range.

Alarming Air Quality Measurements

Various sections of Delhi recorded an pollution measurement above 500, which equals a tenfold increase over the recommended level recommended by the WHO.

Particular areas, concentrations of toxic particulate matter reached peaks of 1,800, representing 15-20x exceeding healthy limits.

Firecracker Ban and New Developments

Since 2020, officials had enforced a complete ban on the distribution and bursting of pyrotechnics during Diwali due to their major role to the hazardous haze that blankets the city as winter begins.

Nevertheless in recent months, the current local leadership petitioned the supreme court to seek a modification of the prohibition.

They proposed allowing "environmentally conscious pyrotechnics" – previously doubted by conservation groups as being only about 30% reduced emissions – as a compromise between "tradition and environment".

Judicial Verdict and Enforcement

To the disappointment of environmental and health campaigners, judicial authorities agreed to the proposal, specifying that environmentally conscious fireworks could be ignited during limited hours throughout the Diwali.

On Monday night, there was considerable flouting of the designated hours across the capital, with little enforcement regarding whether the fireworks being used were actually the supposedly greener variety.

Numerous monitoring devices throughout Delhi recorded pollution peaking around midnight to extremely hazardous readings recorded during Diwali in at least recent memory.

Regional Consequences

The widespread use of pyrotechnics during the festival also triggered a dispute with adjacent Pakistan, with officials in Pakistani Punjab province partially attributing deteriorating atmospheric conditions in their urban centers on hazardous particles traveling from India following the festivities.

Chronic Environmental Problem

Alarmingly severe readings of pollution in the city have remained as a major issue for fifteen-plus years, with the situation gradually deteriorating.

Around Diwali, the levels of hazardous particles in the environment has been observed to increase dramatically to seventy percent above the most severe records ever documented in Beijing, which was formerly considered as the globally most contaminated metropolis.

Multiple Pollution Contributors

The situation in the city is attributed to a mix of multiple factors including heavy vehicle emissions, airborne particles, construction activities, rubbish burning and pollutants from agricultural fires in neighbouring areas of farming communities.

Throughout these areas, rural residents routinely burn crop residue to expedite field preparation, generating hazardous pollution that remains stagnant over the capital as winter air sets in.

Health and Financial Toll

The economic and health toll on the approximately 33 million residents residing in the Delhi area is substantial, according to numerous investigations.

This pollution leads to elevated rates of neurological, cardiovascular and respiratory disorders, and can even lead to malignancies.

Air quality crisis is projected to be causing approximately 10k untimely deaths per year in Delhi.