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On Tuesday morning citizens of the world's most polluted city were faced with inhaling dangerously toxic air that registered in the "alarming" level.

Record-Breaking Air Quality Levels

Multiple areas of the capital showed an AQI exceeding 500, which translates to 10x the healthy level set by the global health authority.

In some locations, concentrations of dangerous airborne particles soared to of 1800, amounting to 15-20x higher than healthy standards.

Fireworks Prohibition and Recent Policy Shifts

Since 2020, officials had implemented a complete ban on the sale and use of fireworks during Diwali due to their major role to the dangerous smog that covers the capital as winter approaches.

Nevertheless in recent months, the newly elected city administration appealed to the supreme court to request a modification of the prohibition.

Officials advocated for allowing "eco-friendly fireworks" – historically doubted by conservation groups as being only approximately one-third lower impact – as a compromise between "heritage and public health".

Court Decision and Implementation

Despite concerns of public health and environmental campaigners, judges complied with the appeal, specifying that eco-friendly pyrotechnics could be ignited during specific periods throughout the festival.

During the celebrations, there was extensive violation of the time restrictions across the city, with little monitoring regarding whether the pyrotechnics being used were actually the eco-friendly variety.

Many recording stations throughout Delhi recorded air quality reaching highest levels around the night hours to the most severe measurements recorded during Diwali in at least three years.

Cross-Border Effects

The proliferation of firecrackers during the celebrations also sparked a dispute with adjacent Pakistan, with officials in Pakistani Punjab pointing to deteriorating air quality in Lahore on hazardous particles originating in across the border following the festivities.

Long-Standing Environmental Problem

The dangerously high readings of pollution in Delhi have continued as a serious problem for fifteen-plus years, with the condition gradually deteriorating.

Near celebratory seasons, the levels of hazardous particles in the environment has been observed to increase dramatically to significantly exceeding the peak records ever measured in the Chinese city, which was previously regarded as the world's most polluted metropolis.

Multiple Pollution Contributors

This crisis in Delhi is resulting from a convergence of various sources including transportation pollution, construction debris, building projects, garbage fires and pollutants from agricultural fires in adjacent areas of Punjab and Haryana.

Within these states, rural residents regularly ignite agricultural waste to prepare for next season, producing toxic haze that remains stagnant over the capital as cooler air descends.

Public Health and Financial Consequences

Public health and economic impact on the roughly thirty-three million inhabitants living in the capital region is significant, according to various studies.

The contaminated air causes elevated rates of neurological, cardiovascular and breathing diseases, and can result in malignancies.

Air quality crisis is estimated to be accounting for ten thousand early fatalities per year in Delhi.