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On Tuesday morning citizens of the planet's dirtiest urban center found themselves inhaling dangerously toxic air that registered in the "critical" category.

Alarming Pollution Levels

Various sections of the capital registered an AQI over 500, which represents a tenfold increase over the recommended level recommended by the World Health Organization.

Certain monitoring stations, levels of dangerous airborne particles hit highs of 1800, representing 15-20x higher than acceptable limits.

Pyrotechnics Prohibition and Recent Developments

For the past four years, officials had enforced a comprehensive restriction on the purchase and ignition of pyrotechnics during celebrations due to their substantial impact to the dangerous haze that covers the city as winter sets in.

However earlier this year, the current city administration appealed to the judicial authority to seek a relaxation of the prohibition.

Officials advocated for allowing "green crackers" – which have been doubted by conservation groups as being only approximately one-third less polluting – as a middle ground between "tradition and public health".

Judicial Verdict and Reality

Much to the frustration of medical and ecological campaigners, judges approved the appeal, stipulating that eco-friendly pyrotechnics could be ignited during limited periods throughout the festival.

On Monday night, there was considerable flouting of the regulated periods across the metropolis, with minimal enforcement regarding whether the firecrackers being used were actually the eco-friendly type.

Many recording stations throughout the city registered pollution reaching highest levels around late evening to the most severe levels recorded during the festival in at least three years.

Regional Consequences

The widespread use of fireworks during Diwali also sparked a controversy with bordering Pakistan, with officials in Pakistani Punjab partly blaming deteriorating air quality in the city of Lahore on pollutants originating in neighboring India following the festivities.

Chronic Pollution Problem

The dangerously high levels of air contamination in Delhi have continued as a significant challenge for over a decade and a half, with the situation showing no improvement.

Near celebratory seasons, the amount of dangerous airborne contaminants in the air has been documented to spike to significantly exceeding the most severe readings ever documented in China's capital, which was formerly regarded as the planet's dirtiest metropolis.

Multiple Pollution Factors

This crisis in Delhi is attributed to a mix of various sources including automobile exhaust, dust, building projects, garbage fires and haze from crop residue ignition in neighbouring states of neighboring agricultural zones.

Throughout these areas, agricultural workers illegally ignite agricultural waste to expedite field preparation, producing dangerous pollution that then gets trapped over the metropolitan area as colder air sets in.

Public Health and Financial Consequences

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

The contaminated air results in high levels of neurological, cardiovascular and respiratory disorders, and can even lead to malignancies.

The pollution is estimated to be accounting for 10,000 early mortalities per year in the capital.