Air pollution levels in cities vary greatly around the world, though they are typically higher in developing regions. In 2025, the cities of Cairo and Dubai had an average PM2.5 concentrations of ****Ìý²¹²Ô»å **** micrograms per cubic meter (μg/m³) respectively. By comparison, PM2.5 levels in London and New York were less than ***μg/m³. Nevertheless, pollution levels in these four major cities are all higher than the World Health Organization's healthy limit, which are set at an annual average of less than **** μg/m³. There are many sources of air pollution, such as energy production, transportation, and agricultural activities.
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IQAir. (March 24, 2026). Average PM2.5 concentrations in selected major cities worldwide in 2025 (in micrograms per cubic meter of air) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1383851/air-pollution-in-major-cities-worldwide/
IQAir. "Average PM2.5 concentrations in selected major cities worldwide in 2025 (in micrograms per cubic meter of air)." Chart. March 24, 2026. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1383851/air-pollution-in-major-cities-worldwide/
IQAir. (2026). Average PM2.5 concentrations in selected major cities worldwide in 2025 (in micrograms per cubic meter of air). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1383851/air-pollution-in-major-cities-worldwide/
IQAir. "Average Pm2.5 Concentrations in Selected Major Cities Worldwide in 2025 (in Micrograms per Cubic Meter of Air)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 24 Mar 2026, /statistics/1383851/air-pollution-in-major-cities-worldwide/
IQAir, Average PM2.5 concentrations in selected major cities worldwide in 2025 (in micrograms per cubic meter of air) ÌÇÐÄÆƽâ°æ, /statistics/1383851/air-pollution-in-major-cities-worldwide/ (last visited July 26, 2026)
Average PM2.5 concentrations in selected major cities worldwide in 2025 (in micrograms per cubic meter of air) [Graph], IQAir, March 24, 2026. [Online]. Available: /statistics/1383851/air-pollution-in-major-cities-worldwide/
