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Tuesday brought inhabitants of this heavily contaminated metropolis found themselves breathing dangerously toxic air that fell into the "severe" level.

Record-Breaking Pollution Levels

Several parts of the city showed an pollution measurement exceeding 500, which represents a tenfold increase over the safe threshold recommended by the WHO.

Certain monitoring stations, readings of toxic particulate matter hit highs of eighteen hundred, amounting to fifteen to twenty times higher than safe standards.

Pyrotechnics Ban and Current Policy Shifts

For the past four years, the government had implemented a complete ban on the sale and use of firecrackers during Diwali due to their substantial impact to the dangerous haze that engulfs the metropolis as winter sets in.

Yet in recent months, the recently formed local leadership approached the highest court to seek a easing of the restrictions.

The suggestion was allowing "environmentally conscious pyrotechnics" – which have been doubted by environmental experts as being only about 30% lower impact – as a compromise between "cultural practices and ecological concerns".

Court Decision and Reality

To the disappointment of environmental and health activists, the court agreed to the request, stipulating that environmentally conscious fireworks could be ignited during designated periods throughout the celebrations.

During the celebrations, there was extensive violation of the time restrictions across the metropolis, with little monitoring regarding whether the pyrotechnics being used were actually the more environmentally friendly type.

Many monitoring devices throughout the city registered pollution peaking around midnight to some of the worst levels recorded during celebrations in at least the past three years.

International Effects

Extensive ignition of fireworks during the festival also sparked a blame game with neighbouring the neighboring country, with representatives in Pakistani the Punjab region partially attributing deteriorating air quality in Lahore on pollutants traveling from across the border following the celebrations.

Chronic Pollution Problem

Extremely elevated concentrations of atmospheric toxins in the city have persisted as a significant problem for more than 15 years, with the problem gradually deteriorating.

Around the festival period, the amount of hazardous particles in the atmosphere has been observed to shoot up to 70% higher the most severe records ever recorded in the Chinese city, which was once regarded as the world's most polluted metropolis.

Multiple Contamination Sources

This crisis in Delhi is resulting from a convergence of different contributors including transportation pollution, construction debris, construction activities, rubbish burning and haze from crop residue ignition in nearby regions of Punjab and Haryana.

Throughout these areas, rural residents routinely set their fields on fire to expedite field preparation, producing toxic pollution that then gets trapped over the metropolitan area as cooler air descends.

Public Health and Economic Toll

Both financial and medical impact on the nearly 33 million inhabitants calling home the capital region is enormous, according to multiple studies.

This pollution results in elevated rates of neurological, cardiovascular and breathing conditions, and can potentially cause oncological diseases.

Air quality crisis is calculated to be responsible for 10,000 early deaths per year in the city.