As Tuesday dawned citizens of the planet's dirtiest urban center were faced with exposed to dangerously toxic air that was classified as the "critical" level.
Various sections of Delhi registered an pollution measurement over 500, which equals a tenfold increase over the healthy level set by the global health authority.
Certain monitoring stations, concentrations of dangerous airborne particles reached peaks of 1,800, amounting to 15-20x higher than safe standards.
Since 2020, officials had enforced a comprehensive restriction on the purchase and ignition of fireworks during Diwali due to their substantial impact to the deadly haze that covers the city as the cold season begins.
However recently, the newly elected regional leadership approached the supreme court to request a relaxation of the ban.
Officials advocated for allowing "green crackers" – previously criticized by conservation groups as being only about 30% less polluting – as a compromise between "tradition and public health".
To the disappointment of environmental and health campaigners, the court complied with the appeal, specifying that green firecrackers could be set off during specific hours throughout the festival.
On Monday night, there was extensive flouting of the time restrictions across the city, with minimal enforcement regarding whether the pyrotechnics being used were actually the eco-friendly type.
Numerous recording stations throughout the city recorded pollution spiking around the night hours to the most severe readings seen during celebrations in at least the past three years.
The widespread use of fireworks during the celebrations also triggered a dispute with bordering Pakistan, with officials in Pakistan's Punjab pointing to worsening atmospheric conditions in Lahore on pollutants traveling from neighboring India following the events.
Extremely elevated levels of air contamination in the capital have remained as a serious issue for fifteen-plus years, with the problem continuing to worsen.
During the festival period, the levels of hazardous particulate matter in the environment has been documented to increase dramatically to significantly exceeding the peak levels ever measured in the Chinese city, which was once regarded as the globally most contaminated city.
This crisis in Delhi is attributed to a combination of different contributors including transportation pollution, airborne particles, development work, rubbish burning and haze from farm burning in neighbouring regions of Punjab and Haryana.
Within these states, rural residents illegally ignite agricultural waste to expedite field preparation, producing toxic haze that then gets trapped over the city as winter air sets in.
Public health and economic consequences on the nearly 33 million inhabitants living in the Delhi area is enormous, according to numerous investigations.
This pollution results in high levels of neurological, heart and circulatory and breathing diseases, and can even lead to oncological diseases.
Air quality crisis is estimated to be responsible for approximately 10k untimely deaths annually in the capital.
A tech enthusiast and digital strategist with over a decade of experience in analyzing emerging technologies and their impact on society.