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Delhi world’s most polluted major city on eve of Diwali, Swiss group says

By Thomson Reuters Nov 6, 2026 | 11:28 PM

BENGALURU, Nov 7 (Reuters) – Delhi was the world’s most polluted major city on Saturday morning, according to Swiss group IQAir’s ​live ranking, as the Indian capital ‌faced severe pollution forecasts a day before Diwali, the Hindu festival of lights.

• India has ordered schools in and around Delhi to offer online classes, ‌and ​encouraged people to work ⁠from home ahead of ⁠Diwali on Sunday, which is usually marked by the widespread use of firecrackers that further worsen the air quality.

• IQAir ranked ​Delhi first among the world’s major cities at 10:35 a.m. (0505 GMT), with a ⁠US air quality index ⁠reading of 581, double that of ​Lahore in neighbouring Pakistan, at 285.

• IQAir’s reading, ​based on concentrations of air pollutants, is ‌not directly comparable to India’s official index, which uses a different scale and methodology.

• India’s Central Pollution Control Board put Delhi’s ⁠air quality index at 363 at 10 a.m., in the “very poor” category.

• Friday’s air quality in Delhi ⁠was the ‌worst pre-Diwali air in eight ⁠years, local media said, citing ​official data.

• ‌Pollution is an annual problem ​in many ⁠parts of northern India from the onset of winter as cold, heavy air traps vehicle emissions, construction dust and smoke from crop-waste burning.

(Reporting by Munsif Vengattil in Bengaluru; Editing by ​William Mallard)