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Tuesday brought citizens of the world's most polluted city found themselves inhaling extremely polluted air that fell into the "severe" range.

Alarming Pollution Readings

Several parts of Delhi showed an AQI exceeding 500, which equals 10x the healthy limit established by the WHO.

Certain monitoring stations, readings of PM2.5 and PM10 hit highs of eighteen hundred, equating to fifteen to twenty times exceeding acceptable levels.

Fireworks Ban and New Developments

Since 2020, authorities had enforced a total prohibition on the purchase and ignition of firecrackers during celebrations due to their substantial impact to the dangerous haze that engulfs the city as the cold season approaches.

However recently, the newly elected local leadership appealed to the supreme court to seek a easing of the ban.

The suggestion was allowing "green crackers" – which have been criticized by environmental experts as being only roughly 30 percent reduced emissions – as a compromise between "cultural practices and public health".

Legal Decision and Implementation

To the disappointment of public health and environmental campaigners, judges agreed to the request, specifying that environmentally conscious fireworks could be set off during limited periods throughout the festival.

On Monday night, there was extensive disregard of the time restrictions across the metropolis, with minimal enforcement regarding whether the firecrackers being used were actually the eco-friendly version.

Numerous monitoring devices throughout Delhi showed pollution peaking around midnight to some of the worst levels observed during the festival in at least the past three years.

International Consequences

The widespread use of pyrotechnics during the celebrations also sparked a dispute with bordering Pakistan, with authorities in Pakistan's Punjab province pointing to declining pollution levels in their urban centers on hazardous particles originating in across the border following the festivities.

Chronic Pollution Issue

The dangerously high concentrations of atmospheric toxins in Delhi have continued as a major issue for more than 15 years, with the problem gradually deteriorating.

Around Diwali, the levels of toxic airborne contaminants in the atmosphere has been found to increase dramatically to seventy percent above the peak levels ever measured in Beijing, which was previously considered as the globally most contaminated metropolis.

Multiple Pollution Factors

The situation in the city is caused by a convergence of various sources including automobile exhaust, dust, construction activities, garbage fires and smoke from crop residue ignition in neighbouring states of Punjab and Haryana.

Throughout these areas, agricultural workers routinely burn crop residue to expedite field preparation, generating toxic pollution that remains stagnant over the metropolitan area as winter air sets in.

Public Health and Financial Toll

Both financial and medical toll on the nearly 33 million people living in the Delhi area is significant, according to multiple investigations.

These hazardous conditions causes increased incidence of neurological, heart and circulatory and lung conditions, and can potentially cause oncological diseases.

Air quality crisis is calculated to be accounting for ten thousand premature deaths annually in the city.