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As Tuesday dawned residents of the world's most polluted city encountered breathing dangerously toxic air that was classified as the "severe" level.

Record-Breaking Air Quality Readings

Various sections of Delhi showed an AQI exceeding 500, which represents ten times the safe limit established by the global health authority.

In some locations, concentrations of toxic particulate matter soared to of 1800, equating to fifteen to twenty times exceeding safe limits.

Fireworks Restrictions and Current Changes

Since 2020, officials had implemented a total prohibition on the purchase and ignition of firecrackers during Diwali due to their major role to the hazardous smog that covers the city as the cold season begins.

Yet in recent months, the newly elected regional government appealed to the highest court to request a easing of the ban.

The suggestion was allowing "green crackers" – previously questioned by environmentalists as being only roughly 30 percent less polluting – as a balance between "tradition and public health".

Judicial Verdict and Enforcement

Much to the frustration of medical and ecological campaigners, the court agreed to the proposal, specifying that eco-friendly pyrotechnics could be set off during designated time windows throughout the festival.

Throughout the festival evening, there was extensive flouting of the regulated periods across the city, with little enforcement regarding whether the fireworks being used were actually the supposedly greener type.

Several air quality sensors throughout the capital recorded air quality peaking around late evening to the most severe levels observed during Diwali in at least three years.

Cross-Border Effects

The widespread use of pyrotechnics during the celebrations also sparked a dispute with bordering the neighboring country, with representatives in Pakistani the Punjab region partially attributing declining air quality in their urban centers on pollutants originating in neighboring India following the festivities.

Chronic Pollution Issue

Alarmingly severe concentrations of air contamination in Delhi have continued as a significant problem for fifteen-plus years, with the problem gradually deteriorating.

Near Diwali, the concentration of dangerous particulate matter in the environment has been documented to spike to 70% higher the peak records ever recorded in China's capital, which was formerly viewed as the planet's dirtiest city.

Various Pollution Sources

The situation in Delhi is caused by a mix of multiple factors including transportation pollution, airborne particles, building projects, rubbish burning and smoke from farm burning in neighbouring states of Punjab and Haryana.

Within these states, rural residents routinely burn crop residue to prepare for next season, producing toxic haze that remains stagnant over the city as winter air descends.

Medical and Economic Consequences

Both financial and medical impact on the roughly thirty-three million residents residing in the Delhi area is enormous, according to multiple research.

The contaminated air causes high levels of neurological, heart and circulatory and lung diseases, and can potentially cause cancer.

Air quality crisis is estimated to be responsible for 10,000 untimely deaths annually in Delhi.