Tuesday brought residents of the world's most polluted city encountered exposed to extremely polluted air that was classified as the "alarming" level.
Various sections of the city showed an pollution measurement exceeding 500, which equals ten times the safe level set by the World Health Organization.
Certain monitoring stations, levels of PM2.5 and PM10 reached peaks of eighteen hundred, equating to 15-20x higher than acceptable limits.
Since 2020, the government had implemented a total prohibition on the distribution and bursting of pyrotechnics during Diwali due to their substantial impact to the dangerous haze that engulfs the city as the cold season begins.
However earlier this year, the current local administration petitioned the supreme court to seek a easing of the ban.
They proposed allowing "green crackers" – historically questioned by conservation groups as being only roughly 30 percent reduced emissions – as a balance between "cultural practices and public health".
To the disappointment of environmental and health activists, judges approved the request, specifying that green firecrackers could be ignited during limited hours throughout the celebrations.
Throughout the festival evening, there was considerable disregard of the regulated periods across the capital, with little monitoring regarding whether the fireworks being used were actually the more environmentally friendly variety.
Several monitoring devices throughout the city recorded air quality spiking around late evening to the most severe measurements seen during Diwali in at least recent memory.
Extensive ignition of firecrackers during the festival also sparked a dispute with bordering the neighboring country, with officials in Pakistani Punjab province partly blaming worsening pollution levels in their urban centers on pollutants coming from neighboring India following the celebrations.
The dangerously high concentrations of pollution in the capital have continued as a significant issue for more than 15 years, with the situation continuing to worsen.
Around the festival period, the amount of hazardous particles in the environment has been found to increase dramatically to significantly exceeding the worst readings ever recorded in the Chinese city, which was once considered as the world's most polluted urban center.
The situation in the capital is caused by a combination of different contributors including heavy vehicle emissions, construction debris, development work, garbage fires and smoke from crop residue ignition in neighbouring regions of neighboring agricultural zones.
Within these states, rural residents illegally burn crop residue to clear them quickly, producing toxic smog that remains stagnant over the city as colder air arrives.
Both financial and medical toll on the approximately 33 million people residing in the Delhi area is enormous, according to numerous studies.
The contaminated air leads to elevated rates of neurological, heart and circulatory and breathing conditions, and can potentially cause oncological diseases.
Environmental contamination is projected to be responsible for ten thousand untimely deaths annually in the capital.