In brief
Swiss air‑quality tracker IQAir named Delhi as the most polluted city with a US Air Quality Index reading of 581. Indian authorities ordered schools online and urged work‑from‑home to limit pollution from traffic and firecracker use.
On the morning of November 7, 2026, Delhi was reported by Swiss air‑quality tracker IQAir to be the world’s most polluted major city, with a US Air Quality Index reading of 581, more than double the 285 recorded in Lahore.
In comparison, India’s Central Pollution Control Board measured an Air Quality Index of 363 in Delhi at 10 a.m., classifying the day as “very poor”. The two systems use different scales, but both attest to a severe pollution episode.
Officials in Delhi reacted immediately, ordering schools in and around the capital to hold online classes and encouraging people to work from home in advance of Diwali, the Hindu festival of lights. The move was designed to reduce traffic congestion and the emissions that fuel the city’s air‑quality crisis.
Diwali celebrations typically see widespread firecracker use, which further aggravates air pollution. The government’s pre‑emptive measures aimed to curb that additional spike.
According to the report, the air quality on this morning was the worst pre‑Diwali snapshot in Delhi’s history over the past eight years, according to local media citing official data.
Experts say the winter season in northern India creates a cold, heavy air blanket that traps vehicle emissions, construction dust, and smoke from crop‑waste burning, all of which contribute to the steep rise in pollutants.
The Gulf Times, a Doha‑based newspaper, also noted that Delhi is typically ranked the world’s most polluted city several times each winter by IQAir, underscoring the recurrent nature of the city’s pollution challenges.
While the immediate response focuses on limiting human activity to reduce emissions, longer‑term solutions would require cleaner energy, stricter vehicle standards, and fire‑crackers controls—though such measures were not detailed in the current reports.
As the city grapples with daily peaks that threaten public health, the combination of real‑time monitoring and government action illustrates a growing trend in urban environmental management.
