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On Tuesday morning residents of the world's most polluted city were faced with exposed to extremely polluted air that fell into the "critical" range.

Alarming Air Quality Readings

Various sections of Delhi registered an AQI exceeding 500, which represents a tenfold increase over the safe level recommended by the WHO.

Certain monitoring stations, readings of PM2.5 and PM10 reached peaks of 1800, equating to 15 to 20 times exceeding acceptable standards.

Firecracker Ban and Recent Changes

Since 2020, the government had enforced a total prohibition on the purchase and ignition of fireworks during the Festival of Lights due to their substantial impact to the deadly haze that blankets the capital as the cold season begins.

Nevertheless in recent months, the newly elected local administration petitioned the highest court to request a modification of the prohibition.

Officials advocated for allowing "green crackers" – historically doubted by environmentalists as being only roughly 30 percent less polluting – as a middle ground between "tradition and public health".

Judicial Ruling and Enforcement

Much to the frustration of public health and environmental advocates, judges approved the appeal, stipulating that eco-friendly pyrotechnics could be set off during limited periods throughout the Diwali.

Throughout the festival evening, there was widespread violation of the regulated periods across the capital, with insufficient regulation regarding whether the fireworks being used were actually the more environmentally friendly variety.

Several recording stations throughout Delhi recorded contamination peaking around the night hours to extremely hazardous measurements recorded during Diwali in at least the past three years.

International Implications

Extensive ignition of firecrackers during Diwali also triggered a controversy with adjacent the neighboring country, with authorities in Pakistani the Punjab region partially attributing worsening pollution levels in the city of Lahore on hazardous particles coming from across the border following the celebrations.

Persistent Pollution Issue

Extremely elevated concentrations of air contamination in Delhi have continued as a major issue for fifteen-plus years, with the situation showing no improvement.

During celebratory seasons, the concentration of hazardous particulate matter in the air has been observed to shoot up to seventy percent above the most severe readings ever recorded in China's capital, which was formerly considered as the globally most contaminated metropolis.

Diverse Pollution Contributors

The situation in the city is resulting from a mix of different contributors including heavy vehicle emissions, airborne particles, building projects, rubbish burning and pollutants from agricultural fires in nearby areas of neighboring agricultural zones.

Throughout these areas, farmers routinely burn crop residue to clear them quickly, generating toxic pollution that then gets trapped over the city as winter air arrives.

Medical and Economic Consequences

Both financial and medical toll on the nearly 33 million inhabitants calling home the metropolitan zone is significant, according to multiple investigations.

The contaminated air results in elevated rates of neurological, cardiovascular and breathing disorders, and can even lead to oncological diseases.

The pollution is calculated to be causing approximately 10k premature deaths per year in Delhi.