Report Shows Only 13 Nations Met Global Air Safety in 2025
The World Air Quality Report, published by Swiss air monitoring company IQAir, found that merely 14% of cities recorded pollution levels within the World Health Organization (WHO) guidelines for fine particulate matter (PM2.5). That marks a drop from 17% in the previous year, signaling a troubling global trend.
Drawing on data from 9,446 cities across 143 countries, regions, and territories, the report underscores a broad and accelerating deterioration in air conditions worldwide.
PM2.5 particles—tiny pollutants measuring 2.5 micrometers or smaller—pose severe health dangers due to their ability to penetrate deep into the lungs and bloodstream. Exposure has been linked to respiratory illness, cardiovascular disease, and cancer.
Only a limited group of countries, including Andorra, Estonia, and Iceland in Europe, managed to stay within the WHO’s annual safe limit of 5 micrograms per cubic meter. Most other compliant areas were small island nations and territories, such as Australia, Barbados, and Bermuda.
130 of 143 countries exceed safe limits
The report identified South Asia as the most severely affected region, with Pakistan, Bangladesh, and Tajikistan ranking among the most polluted nations globally. It also noted that all 25 of the world’s most polluted cities are concentrated in India, Pakistan, and China.
At the top of the list was Loni, a northern Indian city, where PM2.5 levels exceeded WHO recommendations by more than 22 times—one of the highest recorded pollution concentrations globally.
Experts linked the worsening crisis to a mix of environmental and human-driven factors, including wildfire smoke, dust storms, and extreme weather events intensified by climate change.
The findings also point to significant gaps in monitoring infrastructure, with many regions still lacking access to reliable, real-time air quality data—raising concerns about underreported pollution exposure worldwide.
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