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Tuesday brought residents of this heavily contaminated metropolis were faced with exposed to severely hazardous air that fell into the "alarming" range.

Alarming Pollution Measurements

Multiple areas of the city recorded an AQI above 500, which represents ten times the recommended threshold recommended by the WHO.

Certain monitoring stations, concentrations of PM2.5 and PM10 reached peaks of 1800, equating to fifteen to twenty times above acceptable limits.

Pyrotechnics Prohibition and New Developments

Since 2020, the government had implemented a complete ban on the purchase and ignition of pyrotechnics during Diwali due to their major role to the deadly pollution that engulfs the city as the cold season begins.

Yet recently, the newly elected regional government approached the highest court to seek a relaxation of the prohibition.

Officials advocated for allowing "eco-friendly fireworks" – previously criticized by environmental experts as being only approximately one-third less polluting – as a balance between "cultural practices and environment".

Judicial Decision and Reality

To the disappointment of medical and ecological activists, judicial authorities approved the appeal, stipulating that environmentally conscious fireworks could be set off during specific time windows throughout the celebrations.

On Monday night, there was widespread flouting of the designated hours across the capital, with insufficient enforcement regarding whether the fireworks being used were actually the more environmentally friendly type.

Many recording stations throughout Delhi registered air quality peaking around midnight to the most severe measurements recorded during Diwali in at least recent memory.

Cross-Border Consequences

The widespread use of fireworks during Diwali also triggered a dispute with bordering the neighboring country, with authorities in Pakistani Punjab province partly blaming deteriorating air quality in the city of Lahore on contaminants coming from neighboring India following the events.

Chronic Environmental Problem

Alarmingly severe concentrations of air contamination in the city have persisted as a major challenge for over a decade and a half, with the condition continuing to worsen.

Around Diwali, the concentration of dangerous airborne contaminants in the atmosphere has been observed to increase dramatically to 70% higher the peak readings ever documented in Beijing, which was previously viewed as the globally most contaminated city.

Multiple Pollution Contributors

The situation in the city is resulting from a convergence of different contributors including heavy vehicle emissions, construction debris, building projects, waste incineration and haze from agricultural fires in neighbouring states of neighboring agricultural zones.

In these regions, farmers regularly set their fields on fire to prepare for next season, producing hazardous pollution that becomes contained over the metropolitan area as winter air sets in.

Public Health and Financial Toll

The economic and health impact on the nearly 33 million residents residing in the capital region is significant, according to multiple research.

This pollution leads to high levels of neurological, heart and circulatory and respiratory conditions, and can potentially cause cancer.

Environmental contamination is estimated to be causing 10,000 untimely fatalities annually in Delhi.