New IQAir Report Identifies India and China as Global Epicenters for Hazardous PM2.5 Air Pollution

The 2025 IQAir report shows 64 of the world's top 100 most polluted cities are in India, with China also recording hazardous PM2.5 levels far above safe limits.

By: AXL Media

Published: Apr 7, 2026, 4:43 AM EDT

Source: Information for this report was sourced from VnExpress International

The Alarming Scale of the Asian Air Quality Crisis

A comprehensive analysis of global air quality data has confirmed that Asian urban environments remain the most hazardous in the world. According to the IQAir 2025 World Air Quality Report, which examined nearly 9,500 cities across 143 countries, the concentration of fine particulate matter, or PM2.5, has reached critical levels. In many of the most affected regions, pollution levels are several times higher than the World Health Organization’s recommended threshold of 5 micrograms per cubic meter. This persistent failure to meet health standards places millions of residents at an elevated risk of developing chronic respiratory and cardiovascular diseases as toxic particles penetrate the bloodstream.

India’s Dominance in Global Pollution Rankings

The data highlights a particularly severe situation in India, which accounts for a staggering 64 of the world’s 100 most polluted cities. Leading the global list of hazardous urban areas is Loni, India, where the annual average PM2.5 concentration has reached 112.5 micrograms per cubic meter. Other major Indian centers, including Delhi and Byrnihat, consistently record levels that make them virtually uninhabitable from a long term health perspective. The crisis in these regions is fueled by a combination of dense traffic congestion, industrial emissions, and seasonal agricultural practices such as crop burning, which exacerbate the already poor atmospheric conditions.

China’s Industrial Heartland and Pollution Hotspots

While Beijing has made notable strides in air quality improvement over the last decade, other Chinese cities continue to struggle with severe industrial smog. Hotan, located in western China, currently ranks as the second most polluted city globally, with PM2.5 levels measured at 109.6 micrograms per cubic meter. The persistence of high pollution in Chinese urban centers is largely attributed to the country’s continued reliance on coal based energy and heavy manufacturing. Despite government efforts to promote low carbon development, the concentration of hazardous particles in industrial hubs remain a significant barrier to achieving national public health goals.