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Tuesday brought citizens of the world's most polluted city found themselves inhaling severely hazardous air that was classified as the "severe" category.

Record-Breaking Pollution Readings

Several parts of the capital showed an AQI above 500, which represents 10x the healthy threshold set by the global health authority.

In some locations, concentrations of PM2.5 and PM10 soared to of 1800, representing fifteen to twenty times above acceptable limits.

Firecracker Ban and New Developments

Since 2020, authorities had enforced a comprehensive restriction on the sale and use of firecrackers during celebrations due to their major role to the deadly pollution that blankets the metropolis as the cold season sets in.

Nevertheless earlier this year, the current regional administration appealed to the highest court to propose a relaxation of the restrictions.

The suggestion was allowing "green crackers" – which have been criticized by environmental experts as being only approximately one-third less polluting – as a middle ground between "tradition and ecological concerns".

Court Ruling and Reality

To the disappointment of environmental and health campaigners, judges approved the appeal, specifying that green firecrackers could be set off during limited periods throughout the celebrations.

On Monday night, there was considerable disregard of the regulated periods across the metropolis, with insufficient enforcement regarding whether the pyrotechnics being used were actually the supposedly greener version.

Numerous air quality sensors throughout the capital registered pollution peaking around the night hours to extremely hazardous readings seen during the festival in at least the past three years.

Regional Implications

The proliferation of firecrackers during the festival also triggered a dispute with adjacent Pakistan, with authorities in Pakistan's Punjab partially attributing deteriorating atmospheric conditions in the city of Lahore on hazardous particles originating in India following the events.

Persistent Environmental Issue

Alarmingly severe readings of air contamination in the city have remained as a significant issue for more than 15 years, with the condition continuing to worsen.

Near Diwali, the amount of toxic airborne contaminants in the air has been observed to shoot up to seventy percent above the worst records ever documented in the Chinese city, which was once viewed as the world's most polluted urban center.

Diverse Contamination Factors

The problem in the city is attributed to a mix of multiple factors including heavy vehicle emissions, airborne particles, construction activities, rubbish burning and haze from farm burning in adjacent regions of farming communities.

Within these states, rural residents routinely burn crop residue to prepare for next season, generating hazardous pollution that remains stagnant over the capital as colder air sets in.

Public Health and Economic Toll

Public health and economic impact on the roughly thirty-three million people living in the capital region is substantial, according to multiple investigations.

The contaminated air leads to high levels of nervous system, cardiovascular and respiratory diseases, and can potentially cause cancer.

The pollution is estimated to be responsible for ten thousand untimely deaths each year in Delhi.