On Tuesday morning residents of the planet's dirtiest urban center were faced with exposed to severely hazardous air that fell into the "alarming" level.
Multiple areas of the capital showed an air quality index over 500, which translates to ten times the recommended limit established by the global health authority.
Certain monitoring stations, concentrations of dangerous airborne particles soared to of 1,800, equating to 15-20x exceeding healthy standards.
Since 2020, the government had implemented a total prohibition on the sale and use of firecrackers during celebrations due to their significant contribution to the hazardous smog that engulfs the metropolis as winter begins.
Yet earlier this year, the recently formed city administration approached the supreme court to propose a relaxation of the restrictions.
The suggestion was allowing "green crackers" – historically doubted by environmentalists as being only roughly 30 percent reduced emissions – as a compromise between "heritage and ecological concerns".
To the disappointment of environmental and health advocates, judicial authorities agreed to the request, specifying that green firecrackers could be used during specific hours throughout the Diwali.
Throughout the festival evening, there was widespread flouting of the regulated periods across the capital, with insufficient enforcement regarding whether the fireworks being used were actually the supposedly greener variety.
Many monitoring devices throughout the capital showed air quality spiking around the night hours to some of the worst measurements observed during the festival in at least recent memory.
The proliferation of firecrackers during the festival also initiated a blame game with neighbouring the neighboring country, with authorities in Pakistan's Punjab province pointing to declining pollution levels in Lahore on pollutants traveling from neighboring India following the events.
The dangerously high readings of pollution in Delhi have remained as a significant challenge for over a decade and a half, with the situation showing no improvement.
Around celebratory seasons, the levels of hazardous airborne contaminants in the air has been documented to shoot up to significantly exceeding the peak levels ever recorded in the Chinese city, which was once regarded as the world's most polluted urban center.
This crisis in the capital is caused by a convergence of various sources including automobile exhaust, dust, development work, waste incineration and pollutants from farm burning in adjacent areas of farming communities.
Within these states, rural residents regularly ignite agricultural waste to prepare for next season, generating dangerous haze that becomes contained over the capital as winter air sets in.
Public health and economic toll on the nearly 33 million inhabitants living in the metropolitan zone is substantial, according to numerous investigations.
The contaminated air causes high levels of neurological, heart and circulatory and lung disorders, and can potentially cause malignancies.
Air quality crisis is projected to be responsible for approximately 10k premature mortalities each year in the city.
An experienced educator and maker enthusiast passionate about integrating technology into hands-on learning experiences.