Real-time air quality index data across the globe.
Air quality is satisfactory
Acceptable air quality
Members of sensitive groups may experience health effects
Everyone may begin to experience health effects
Health warnings of emergency conditions
Health alert: everyone may experience serious health effects
Bangladesh, Pakistan, and India consistently rank among the world's most polluted countries.
Major factors: industrial emissions, vehicle exhaust, crop burning, and construction dust.
New Zealand, Finland, and Iceland consistently maintain the world's cleanest air.
Key factors: strict environmental policies, low population density, and abundant natural spaces.