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As Tuesday dawned citizens of the world's most polluted city were faced with inhaling severely hazardous air that registered in the "alarming" level.

Extremely High Air Quality Levels

Multiple areas of the city registered an pollution measurement above 500, which equals 10x the recommended threshold established by the World Health Organization.

Certain monitoring stations, levels of PM2.5 and PM10 reached peaks of eighteen hundred, representing 15 to 20 times above healthy limits.

Firecracker Restrictions and Recent Changes

Since 2020, officials had enforced a complete ban on the purchase and ignition of pyrotechnics during celebrations due to their substantial impact to the dangerous haze that engulfs the city as colder weather approaches.

Nevertheless recently, the recently formed local administration appealed to the judicial authority to seek a modification of the ban.

Officials advocated for allowing "green crackers" – previously questioned by environmentalists as being only about 30% less polluting – as a middle ground between "cultural practices and environment".

Court Decision and Reality

Despite concerns of environmental and health activists, judges agreed to the appeal, mandating that eco-friendly pyrotechnics could be ignited during limited hours throughout the celebrations.

During the celebrations, there was widespread violation of the time restrictions across the metropolis, with little monitoring regarding whether the fireworks being used were actually the supposedly greener type.

Numerous air quality sensors throughout the city registered pollution spiking around midnight to some of the worst levels seen during celebrations in at least the past three years.

Cross-Border Implications

The widespread use of fireworks during Diwali also sparked a controversy with neighbouring Pakistan, with officials in Pakistan's Punjab partly blaming worsening pollution levels in their urban centers on contaminants originating in across the border following the festivities.

Persistent Environmental Issue

Extremely elevated levels of pollution in the capital have persisted as a major issue for more than 15 years, with the situation showing no improvement.

Near the festival period, the amount of toxic airborne contaminants in the atmosphere has been observed to increase dramatically to seventy percent above the peak readings ever documented in Beijing, which was once viewed as the world's most polluted metropolis.

Diverse Pollution Sources

The situation in Delhi is resulting from a mix of various sources including heavy vehicle emissions, construction debris, development work, rubbish burning and haze from agricultural fires in adjacent regions of Punjab and Haryana.

Within these states, agricultural workers routinely set their fields on fire to clear them quickly, creating toxic pollution that remains stagnant over the city as colder air arrives.

Health and Financial Consequences

The economic and health impact on the nearly 33 million people residing in the metropolitan zone is substantial, according to multiple research.

These hazardous conditions results in high levels of nervous system, cardiovascular and breathing conditions, and can result in cancer.

The pollution is projected to be responsible for ten thousand untimely mortalities each year in the city.