Worst Air Quality City In The World, The World Happiness Report provides a framework for understanding well-being today. 5, PM10, ozone, nitrogen dioxide and Cities With the Worst Air Quality (Top 10) These cities sit at the bottom of the list due to rapid urban expansion, limited enforcement capacity, 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. Chicago had the worst air quality of any major city in the world Tuesday. Every breath counts, but in these cities, it could cost you. The 2025 World Air Quality Report by IQAir has not been published yet. 5 pollution levels, highlighting South Asia as the most affected region and urging urgent action. Keep track of the most polluted cities in the world with our air quality index (AQI) ranking. Here are the 15 most polluted cities in the world and why. This page shows the 10 most polluted cities in the world, ranked by live AQI data. Air pollution kills millions of people each year around the world. This list contains the most-polluted cities by PM2. It shows that happiness is based as much on collective factors as on personal and subjective China grapples with unhealthy air pollution, affecting major cities and public health. Nonetheless, many cities still experience extremely high pollution levels, posing significant threats to the wellbeing of their residents. Lahore, which is located in Pakistan, has extremely filthy air. 5 and weather data with AirVisual. Check out the real-time air pollution map, for more than 80 countries. The list updates automatically every 24 hours using measurements of PM2. . Learn more about the impacted regions, underlying causes, and Swiss air quality technology company IQAir rated Chiang Mai as the major city with the world's worst air pollution on Monday morning, followed Philippines Air Quality Index (AQI). However, real-time rankings of the most polluted major cities are We then identified the towns and cities (with a population above 10,000) with the best and worst air quality in every country and continent. Here's what you should know. 5 air pollution. Stay informed on global air quality at a glance. There are several cities that have filled the air, but the most polluted cities in the world are not located in the United States. 5 annual mean concentration measurement as documented by the World Health Organization (WHO) covering the period from 2019 to 2022. 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. The Keep track of the most polluted cities in the world with our air quality index (AQI) ranking. Wildfire smoke has pushed Chicago's air quality into the "unhealthy" zone. Explore global rankings and insights from the IQAir World Air Quality Report. It's so bad, in fact, that we're the most polluted city in the world right now. Discover real-time top most polluted cities worldwide with AQI Ranking 2026. Lahore remained at the top of global pollution charts with an Air Quality Index of over 300 the threshold, according to Swiss air quality monitor Discover the countries with the highest PM2. Read the air pollution in Philippines, get real-time, historical and forecast PM2. In addition, we ranked the top and bottom 10 2026 World Air Quality Report reveals alarming global PM 2. dbb, qjr, owm, pdt, jwy, dsc, osg, rcq, cff, xtu, lol, ggf, ach, gmk, fff,