World Air Quality Report 2025 The World Air Quality Report 2025 released by IQAir points to a worsening trend in global air pollution. WHO Standards: Only 14% of cities complied with the World Health Organization guideline for PM2.5 (5 µg/m³) in 2025, compared to 17% in 2024, indicating a decline. Most Polluted Country: Pakistan recorded the highest pollution levels, with PM2.5 concentrations exceeding 13 times the WHO limit. Most Polluted City: Loni in Uttar Pradesh emerged as the world’s most polluted city, with PM2.5 levels roughly 22 times higher than recommended levels. Regional Trend: A majority of the most polluted cities are located in India, Pakistan, and China, making Central and South Asia the worst-affected region. India’s Ranking: India ranked as the 6th most polluted country in 2025, showing a slight improvement from 5th place in 2024. Polluted Capital: New Delhi continued to be the most polluted capital city globally for the 8th year in a row.
