As Tuesday dawned residents of this heavily contaminated metropolis encountered inhaling extremely polluted air that was classified as the "alarming" level.
Various sections of the capital registered an AQI above 500, which represents 10x the safe limit set by the World Health Organization.
Particular areas, concentrations of PM2.5 and PM10 hit highs of eighteen hundred, equating to fifteen to twenty times above healthy levels.
For the past four years, the government had maintained a total prohibition on the purchase and ignition of firecrackers during celebrations due to their major role to the deadly smog that engulfs the metropolis as the cold season approaches.
However recently, the recently formed local administration petitioned the supreme court to seek a relaxation of the ban.
The suggestion was allowing "eco-friendly fireworks" – historically criticized by environmentalists as being only approximately one-third reduced emissions – as a middle ground between "cultural practices and environment".
Despite concerns of environmental and health activists, judges agreed to the request, specifying that environmentally conscious fireworks could be used during limited hours throughout the Diwali.
Throughout the festival evening, there was extensive violation of the time restrictions across the capital, with minimal enforcement regarding whether the firecrackers being used were actually the supposedly greener version.
Several recording stations throughout Delhi registered contamination peaking around the night hours to the most severe readings observed during the festival in at least the past three years.
Extensive ignition of firecrackers during the festival also initiated a dispute with bordering Pakistan, with representatives in Pakistan's the Punjab region partially attributing worsening pollution levels in Lahore on hazardous particles coming from India following the celebrations.
Extremely elevated levels of atmospheric toxins in the city have continued as a significant issue for fifteen-plus years, with the condition gradually deteriorating.
Near celebratory seasons, the amount of hazardous particulate matter in the environment has been documented to increase dramatically to seventy percent above the peak records ever recorded in China's capital, which was formerly viewed as the planet's dirtiest city.
The situation in Delhi is resulting from a combination of different contributors including automobile exhaust, dust, building projects, rubbish burning and haze from crop residue ignition in adjacent states of farming communities.
In these regions, agricultural workers routinely ignite agricultural waste to expedite field preparation, generating hazardous pollution that then gets trapped over the metropolitan area as cooler air sets in.
Public health and economic consequences on the approximately 33 million inhabitants residing in the capital region is significant, according to multiple studies.
These hazardous conditions leads to increased incidence of nervous system, cardiovascular and breathing disorders, and can result in oncological diseases.
Environmental contamination is calculated to be accounting for 10,000 early deaths each year in Delhi.
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