Polly

Live ranking

Most polluted cities right now

15 world cities ranked by air quality — each value is the worst pollutant as a multiple of the WHO safe limit. Updated continuously.

  1. 1DelhiIndiaHazardousPM10 16.6×
  2. 2JakartaIndonesiaHazardousPM2.5 11.0×
  3. 3DubaiUnited Arab EmiratesWell above WHO limitsPM2.5 3.3×
  4. 4BeijingChinaWell above WHO limitsPM2.5 3.1×
  5. 5Hong KongHong KongWell above WHO limitsNO₂ 2.8×
  6. 6Los AngelesUnited StatesAbove WHO limitsPM2.5 1.7×
  7. 7MumbaiIndiaAbove WHO limitsPM2.5 1.7×
  8. 8SingaporeSingaporeAbove WHO limitsNO₂ 1.7×
  9. 9TorontoCanadaAbove WHO limitsPM2.5 1.4×
  10. 10SydneyAustraliaAbove WHO limitsNO₂ 1.2×
  11. 11MadridSpainAbove WHO limitsO₃ 1.1×
  12. 12CairoEgyptAbove WHO limitsPM2.5 1.1×
  13. 13WarsawPolandAbove WHO limitsO₃ 1.1×
  14. 14JohannesburgSouth AfricaAbove WHO limitsPM2.5 1.0×
  15. 15ViennaAustriaWithin WHO limitsO₃ 1.0×

Cleanest air right now

  1. 1MelbourneAustraliaClean airO₃ 0.5×
  2. 2San FranciscoUnited StatesClean airPM2.5 0.5×
  3. 3DublinIrelandWithin WHO limitsO₃ 0.7×
  4. 4LagosNigeriaWithin WHO limitsO₃ 0.7×
  5. 5ParisFranceWithin WHO limitsO₃ 0.7×
  6. 6LondonUnited KingdomWithin WHO limitsO₃ 0.7×
  7. 7BogotaColombiaWithin WHO limitsPM2.5 0.8×
  8. 8ChicagoUnited StatesWithin WHO limitsO₃ 0.8×
  9. 9NairobiKenyaWithin WHO limitsO₃ 0.8×
  10. 10AmsterdamNetherlandsWithin WHO limitsO₃ 0.8×

How this works

Each city is scored by its most-exceeded pollutant, normalised against the World Health Organization's 2021 air-quality guidelines (so a score of 3× means three times the level considered safe). Data is live from Open-Meteo / CAMS. Tap any city to see its full live breakdown, or check your own area.