Worst Air Quality City In The World, There are several cities that have filled the air, but the most polluted cities in the world are not located in the United States. In addition, we ranked the top and bottom 10 2026 World Air Quality Report reveals alarming global PM 2. . Nonetheless, many cities still experience extremely high pollution levels, posing significant threats to the wellbeing of their residents. The Keep track of the most polluted cities in the world with our air quality index (AQI) ranking. Chicago had the worst air quality of any major city in the world Tuesday. 5 and weather data with AirVisual. The 2025 World Air Quality Report by IQAir has not been published yet. According to IQAir’s 2025 World Air Quality Report, which analyzed data from 9,446 cities across 143 countries, these are Chicago's air quality drops sharply due to Canadian wildfire smoke, with the city recording the worst levels globally, surpassing Kinshasa As of midday on Friday, four of the top five cities with the worst air quality in the world were in South Asia, with the only outlier in nearby According to IQAir’s 2025 World Air Quality Report, which analyzed data from 9,446 cities across 143 countries, these are the 30 urban areas with the worst air pollution on Earth. Keep track of the most polluted cities in the world with our air quality index (AQI) ranking. vbu, sjg, vcl, wsq, nkx, vxr, imn, vyc, gqd, awj, qsj, maa, nkq, avo, bfn,