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

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1. 28m ago

   Delhi air quality hits hazardous levels on Diwali eve despite firecracker ban

   Delhi recorded the world's worst air quality among major cities on the eve of Diwali, with pollution levels exceeding 50 times the WHO safe limit in some areas. Residents defied a Supreme Court ban on firecrackers, adding to seasonal stubble-burning smoke and vehicle emissions. The Swiss monitoring group IQAir ranked Delhi as the most polluted major city globally. Post-Diwali readings showed the capital choking under toxic smog, marking the most polluted Diwali eve in a decade. Authorities face mounting pressure to enforce existing bans and address chronic winter pollution sources.

   Why it matters

   Delhi's annual winter pollution crisis peaks around Diwali when firecracker smoke combines with crop-residue burning from neighbouring states, low wind speeds, and temperature inversions that trap pollutants. The Supreme Court has repeatedly banned firecrackers, but enforcement remains weak. Hazardous PM2.5 levels pose immediate health risks, especially to children and the elderly, and disrupt daily life, schools, and transport.

   What is confirmed

   • Delhi ranked as the world's most polluted major city on the eve of Diwali according to Swiss monitoring group IQAir.
   • Air pollution levels exceeded 50 times the WHO safe limit in parts of Delhi.
   • Residents defied a Supreme Court ban on firecrackers during Diwali celebrations.
   • Post-Diwali smog made this the most polluted Diwali eve in 10 years.

   Still unconfirmed

   • Authorities may impose stricter emergency measures like odd-even vehicle rationing or school closures in coming days.

   What to watch next

   • Government enforcement actions against firecracker violators
   • Air quality index trends over the next 48 hours as smog dissipates or worsens
   • Supreme Court or pollution control board directives on emergency measures
   Sources used for this update (15)

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   6. Reuters — Delhi world's most polluted major city on eve of Diwali, Swiss group says
   7. AP News — New Delhi wakes to toxic smog after Diwali as firecrackers add to seasonal pollution crisis
   8. Yahoo — Indian capital chokes with pollution after Diwali fireworks
   9. dw.com — India: Delhi chokes on most polluted Diwali eve in 10 years
   10. The Hindu — Air pollution over 50 times WHO limit in parts of Delhi as people defy ban on firecrackers on Deepavali
   11. visittampere.fi — Welcome to Tampere! - Visit Tampere
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