Keep track of the most polluted cities in the world with our air quality index (AQI) ranking.

The American Lung Association "State of the Air 2024" report ranks cities and grades counties based on ozone and particle pollution during 2020, 2021 and 2022. For particle pollution, we rank separately the areas with high year-round (annual average) levels and high short-term levels (24-hour) found in monitoring sites across the United States.

Apr 21, 2022 · The latest State of the Air report from the American Lung Association gives Maricopa County a failing grade for air pollution, and found that 84% of Arizonans live in areas with high-risk of unhealthy air.

Find out the most polluted cities in the world in 2023. Check out which city in the world had the highest level of air pollution PM2.5. Download the IQAir AirVisual world air quality report.

Get a monitor and contribute air quality data in your city. How much pollution do air quality maps show in Phoenix? Air quality maps in Phoenix will show many readings across the city, with numerous stations all contributing to the readings seen across the pollution map.

Apr 25, 2024 · Bakersfield is the most polluted city in the U.S. by year-round air quality, according to the ALA. It is the third city in California’s Central Valley to make the list, joining the Fresno and ...

Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as …

Mar 24, 2025 · The Phoenix metro area is experiencing worsening air quality due to high ozone levels, despite efforts to reduce emissions. Health experts warn that ozone pollution poses significant health risks ...

Most cities have polluted air, but the type of pollution varies from place to place. Local policies have improved air quality in some cities, while pollution has worsened in others. Some of the most polluted cities lack air quality monitoring stations and health data.

Check out the real-time air pollution map, for more than 80 countries. Can not find your city on the map? The GAIA air quality monitor uses laser particle sensors to measure in real-time PM2.5 and PM10 particle pollution, which is one of the most harmful air pollutants.