Top 100 Most Polluted Cities In 2025

Top 100 Most Polluted Cities In 2025. Using 2022 average pm2.5 concentrations, we've ranked the most polluted cities in the world according to iqair. 51 rows ghaziabad is the most polluted city in the world with an average air quality index of 110.2, putting it in the “unhealthy” air quality category for 2019.

Scroll down below for the full rundown of the world’s most polluted cities, which countries they’re in, and their annual average pm2.5 levels. Last week, it got so bad for the 20.