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.
- 1JohannesburgSouth AfricaHazardousPM2.5 13.7×
- 2JakartaIndonesiaHazardousPM2.5 6.6×
- 3DelhiIndiaHazardousPM2.5 5.1×
- 4DubaiUnited Arab EmiratesHazardousPM2.5 4.4×
- 5BeijingChinaWell above WHO limitsPM2.5 3.6×
- 6MoscowRussiaWell above WHO limitsPM2.5 3.2×
- 7AthensGreeceWell above WHO limitsNO₂ 2.8×
- 8Sao PauloBrazilWell above WHO limitsPM2.5 2.4×
- 9LagosNigeriaWell above WHO limitsPM2.5 2.4×
- 10BarcelonaSpainWell above WHO limitsNO₂ 2.3×
- 11MumbaiIndiaWell above WHO limitsPM10 2.2×
- 12Hong KongHong KongWell above WHO limitsNO₂ 2.0×
- 13ShanghaiChinaAbove WHO limitsPM2.5 1.8×
- 14SydneyAustraliaAbove WHO limitsPM2.5 1.3×
- 15Los AngelesUnited StatesAbove WHO limitsPM2.5 1.3×
Cleanest air right now
- 1BangkokThailandClean airO₃ 0.4×
- 2RomeItalyClean airO₃ 0.5×
- 3PragueCzechiaClean airPM2.5 0.5×
- 4ViennaAustriaWithin WHO limitsO₃ 0.5×
- 5BrusselsBelgiumWithin WHO limitsNO₂ 0.6×
- 6BerlinGermanyWithin WHO limitsO₃ 0.6×
- 7MadridSpainWithin WHO limitsNO₂ 0.6×
- 8DublinIrelandWithin WHO limitsO₃ 0.6×
- 9SingaporeSingaporeWithin WHO limitsNO₂ 0.6×
- 10HelsinkiFinlandWithin WHO limitsO₃ 0.6×
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.