In brief
On the eve of Diwali, intelligence from Swiss firm IQAir showed Delhi’s air quality index climbing to 581, the highest among major cities. Indian authorities responded by mandating online schooling and encouraging work from home, while official monitors recorded the condition as “very poor.” The city’s grim statistics come amid repeated winter‑time pollution spikes.
On Saturday morning, before the lights of Diwali illuminated the capital, the Swiss air‑quality tracker IQAir ranked Delhi as the world’s most polluted major city. At 10:35 a.m. local time, its US Air Quality Index (AQI) spiked to 581, more than double the 285 read in Lahore, Pakistan, according to a live ranking released by the company.
While the IQAir figure is calculated from concentrations of fine particulate matter and other air pollutants, it is not directly comparable to India’s own metrics, which use a different scale and methodology. 10 a.m. readings from the Indian Central Pollution Control Board put Delhi’s AQI at 363, categorised as “very poor.” The totality of the data suggests the city’s pollution levels were the worst of the pre‑Diwali season in eight years, local media said, citing official data.
In response to the alarmingly high levels, the Indian government has ordered schools in and around Delhi to switch to online classes and has urged workers to work from home. The encouragement comes just before Diwali, a holiday traditionally marked by widespread use of fireworks that itself can sharply deteriorate air quality further.
Experts point to a routine winter‑time dynamic that keeps northern Indian cities at the top of pollution lists each year. Cold, heavy air can trap vehicle emissions, construction dust, crop‑burning smoke and other pollutants, impeding their dispersion. The winter cycle also tends to coincide with increased domestic cooking smoke and heating in densely populated regions.
A report from Gulf Times highlighted that Delhi has “typically been ranked the world’s most polluted city several times each winter” by the Swiss tracker, underscoring a long‑term pattern rather than a one‑off event.
On Friday, a Facebook post from the English Salar account reported Delhi’s AQI reached 391, “nearing the severe category.” The post noted that thirty monitoring stations – including a station in Rohini – recorded severe air quality levels, adding to the evidence that pollution is widespread across the capital’s suburbs.
What remains unclear is how effectively the shift to online schooling and remote work will reduce individual exposure to smog, according to the sources cited. No data yet indicate whether the mandated policy measures will lower daily AQI levels, or how firecracker use on the holiday might alter the picture. Likewise, the precise blend of contributing factors – whether crop burning, vehicular traffic, or industrial emissions – has not been detailed by any of the reporting outlets.
