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Tuesday brought residents of this heavily contaminated metropolis found themselves breathing severely hazardous air that fell into the "severe" range.

Alarming Air Quality Measurements

Multiple areas of the capital showed an AQI exceeding 500, which represents ten times the healthy threshold set by the WHO.

In some locations, concentrations of toxic particulate matter reached peaks of 1,800, equating to 15-20x above healthy levels.

Fireworks Prohibition and New Changes

Since 2020, officials had implemented a comprehensive restriction on the sale and use of pyrotechnics during celebrations due to their major role to the dangerous smog that engulfs the capital as the cold season approaches.

Nevertheless recently, the newly elected city government petitioned the supreme court to seek a relaxation of the ban.

Officials advocated for allowing "eco-friendly fireworks" – which have been criticized by conservation groups as being only approximately one-third lower impact – as a compromise between "cultural practices and environment".

Legal Ruling and Implementation

Much to the frustration of environmental and health activists, judges agreed to the proposal, mandating that eco-friendly pyrotechnics could be used during specific hours throughout the Diwali.

Throughout the festival evening, there was extensive violation of the regulated periods across the metropolis, with insufficient enforcement regarding whether the fireworks being used were actually the more environmentally friendly version.

Many recording stations throughout Delhi registered contamination reaching highest levels around the night hours to the most severe readings seen during celebrations in at least recent memory.

International Effects

The widespread use of fireworks during the festival also triggered a dispute with neighbouring Pakistan, with representatives in Pakistani Punjab province partly blaming deteriorating atmospheric conditions in Lahore on hazardous particles traveling from neighboring India following the festivities.

Persistent Environmental Issue

Extremely elevated readings of air contamination in Delhi have persisted as a serious issue for fifteen-plus years, with the problem showing no improvement.

Near the festival period, the concentration of toxic particles in the environment has been observed to spike to 70% higher the worst readings ever recorded in Beijing, which was previously regarded as the world's most polluted urban center.

Diverse Contamination Factors

The problem in the capital is resulting from a mix of multiple factors including automobile exhaust, airborne particles, construction activities, rubbish burning and haze from agricultural fires in adjacent regions of Punjab and Haryana.

In these regions, farmers regularly burn crop residue to prepare for next season, generating toxic smog that then gets trapped over the metropolitan area as colder air descends.

Health and Economic Impact

The economic and health consequences on the approximately 33 million inhabitants calling home the Delhi area is significant, according to various research.

These hazardous conditions leads to high levels of nervous system, cardiovascular and breathing diseases, and can potentially cause malignancies.

Air quality crisis is projected to be accounting for ten thousand early fatalities annually in the city.