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Tuesday brought inhabitants of the world's most polluted city found themselves inhaling extremely polluted air that was classified as the "critical" level.

Record-Breaking Air Quality Readings

Various sections of Delhi recorded an pollution measurement exceeding 500, which translates to 10x the recommended threshold set by the World Health Organization.

Particular areas, levels of PM2.5 and PM10 reached peaks of eighteen hundred, equating to fifteen to twenty times higher than acceptable levels.

Firecracker Prohibition and Current Policy Shifts

Beginning in 2020, authorities had implemented a comprehensive restriction on the sale and use of fireworks during the Festival of Lights due to their substantial impact to the dangerous haze that covers the capital as the cold season approaches.

Nevertheless in recent months, the current local administration petitioned the judicial authority to seek a modification of the prohibition.

They proposed allowing "eco-friendly fireworks" – which have been criticized by conservation groups as being only about 30% less polluting – as a compromise between "tradition and environment".

Judicial Decision and Implementation

Much to the frustration of environmental and health campaigners, the court agreed to the proposal, stipulating that green firecrackers could be used during limited hours throughout the festival.

Throughout the festival evening, there was considerable violation of the regulated periods across the capital, with little monitoring regarding whether the firecrackers being used were actually the supposedly greener variety.

Several air quality sensors throughout Delhi registered contamination reaching highest levels around late evening to extremely hazardous measurements recorded during Diwali in at least three years.

Regional Consequences

The proliferation of fireworks during Diwali also sparked a dispute with adjacent Pakistan, with representatives in Pakistani Punjab partly blaming declining air quality in the city of Lahore on pollutants traveling from India following the celebrations.

Persistent Pollution Issue

Extremely elevated levels of air contamination in Delhi have persisted as a significant problem for fifteen-plus years, with the problem continuing to worsen.

Near celebratory seasons, the amount of dangerous airborne contaminants in the atmosphere has been found to increase dramatically to seventy percent above the worst readings ever documented in the Chinese city, which was once considered as the globally most contaminated urban center.

Various Pollution Contributors

The situation in the capital is attributed to a combination of various sources including transportation pollution, dust, building projects, waste incineration and smoke from agricultural fires in adjacent states of Punjab and Haryana.

Within these states, rural residents routinely ignite agricultural waste to clear them quickly, generating toxic pollution that becomes contained over the city as cooler air descends.

Public Health and Economic Toll

Public health and economic impact on the roughly thirty-three million people residing in the metropolitan zone is enormous, according to numerous investigations.

The contaminated air causes increased incidence of nervous system, cardiovascular and respiratory diseases, and can potentially cause cancer.

Air quality crisis is projected to be accounting for 10,000 early deaths annually in Delhi.