Kuwait City, Kuwait
Johannesburg, South Africa
Tel Aviv-Yafo, Israel
Mexico City, Mexico
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Most polluted cities
See a ranking of 2021’s most polluted cities.
Most polluted countries
See a ranking of 2021’s most polluted countries.
Earth Day: How you can save the planet
This Earth Day, join the fight for clean air by becoming a contributor.
2021 IQAir World Air Quality Report
The report finds that 97 percent of global cities did not meet latest WHO air quality guidelines.
Fall air quality issues
Fall air quality issues can make daily life a challenge. Learn more.
New WHO air quality guidelines will save lives
The WHO has revised its air quality guidelines for the first time in 15 years. See what’s changed.
New real-time air pollution exposure calculator boosts quality of air quality monitoring
IQAir and UNEP calculate air pollution exposure, informing people who are most at risk. Learn more.
Digital billboards bring real-time air pollution data to Nairobi
Learn how IQAir is collaborating to deliver critical air quality data to Kenya’s capital city.