Air Quality Report 2023
Air Quality Report 2023 is released by IQAir.
The World Air Quality Report 2023 provides a global review of air quality data for the year 2023. The report summarizes PM2.5 air quality data from 7,812 cities spanning 134 countries, regions, and territories.
The data utilized to create this report was aggregated from more than 30,000 air quality monitoring stations operated by research institutions, governmental bodies, universities and educational facilities, non-profit organizations, private companies, and citizen scientists.
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The World Air Quality Report 2023 was created from real-time air quality data sourced from IQAir’s global air quality monitoring platform that vets incoming data with validation and calibration protocols to harmonize air quality data from monitoring stations around the world.
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Finding of Air Quality Report 2023
World’s most polluted cities
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
Top Most polluted cities:
- Begusarai, India
- Guwahati, India
- Delhi, India
- Mullanpur, India
- Lahore, Pakistan
World’s most polluted countries & regions
Top Most polluted country and region ranking based on annual average PM2.5 concentration (μg/m³)
- Bangladesh
- Pakistan
- India
- Tajikistan
- Burkina Faso
- Africa remains the most underrepresented continent, with a third of the population still lacking access to air quality data.
- Climate conditions and transboundary haze were major factors in Southeast Asia, where PM2.5 concentrations rose in nearly every country.
- The region of Central & South Asia was home to the top ten most polluted cities in the world.
- The most polluted major U.S. city was Columbus, Ohio. Beloit, Wisconsin was the most polluted city in the U.S.
- Las Vegas, Nevada was the cleanest major city in the U.S.
- For the first time in the history of this report, Canada was the most polluted country in Northern America, with the region’s 13 most polluted cities located within its borders.
- 70% of the real-time air quality data in the region of Latin America & Caribbean comes from low-cost sensors.
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