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On Tuesday morning citizens of this heavily contaminated metropolis found themselves breathing extremely polluted air that was classified as the "severe" level.

Extremely High Pollution Measurements

Multiple areas of the capital registered an pollution measurement exceeding 500, which translates to 10x the healthy limit recommended by the World Health Organization.

In some locations, concentrations of PM2.5 and PM10 soared to of 1800, amounting to fifteen to twenty times above safe levels.

Firecracker Restrictions and Recent Changes

Beginning in 2020, the government had maintained a complete ban on the sale and use of firecrackers during Diwali due to their significant contribution to the dangerous haze that engulfs the metropolis as colder weather approaches.

Yet recently, the current city administration appealed to the supreme court to request a relaxation of the ban.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been doubted by environmentalists as being only about 30% reduced emissions – as a balance between "heritage and ecological concerns".

Legal Decision and Reality

To the disappointment of public health and environmental campaigners, the court complied with the proposal, mandating that eco-friendly pyrotechnics could be set off during specific hours throughout the Diwali.

During the celebrations, there was extensive violation of the designated hours across the metropolis, with little monitoring regarding whether the firecrackers being used were actually the eco-friendly variety.

Numerous recording stations throughout the city recorded air quality reaching highest levels around late evening to the most severe measurements recorded during the festival in at least three years.

Regional Effects

Extensive ignition of firecrackers during Diwali also sparked a controversy with adjacent the neighboring country, with authorities in Pakistan's Punjab province pointing to declining atmospheric conditions in Lahore on hazardous particles coming from neighboring India following the celebrations.

Long-Standing Pollution Crisis

Alarmingly severe readings of pollution in the city have remained as a serious problem for over a decade and a half, with the problem continuing to worsen.

Around the festival period, the amount of toxic particles in the air has been observed to shoot up to significantly exceeding the most severe records ever documented in China's capital, which was formerly considered as the world's most polluted metropolis.

Diverse Pollution Sources

This crisis in Delhi is attributed to a mix of different contributors including transportation pollution, airborne particles, development work, garbage fires and pollutants from farm burning in adjacent areas of Punjab and Haryana.

In these regions, farmers illegally ignite agricultural waste to expedite field preparation, generating hazardous pollution that then gets trapped over the capital as colder air descends.

Health and Financial Toll

Both financial and medical impact on the roughly thirty-three million residents calling home the metropolitan zone is enormous, according to various studies.

This pollution leads to elevated rates of nervous system, cardiovascular and lung disorders, and can result in oncological diseases.

Air quality crisis is estimated to be causing approximately 10k premature mortalities annually in the capital.