Emissions

The World's Most Polluted Capital Cities

Among the capital cities of 134 countries and regions analyzed in the 2023 World Air Quality Report published by air purification equipment manufacturer IQAir, New Delhi ranked first with an average annual PM2.5 concentration of 92.7 micrograms per cubic meter of air. This number exceeds the most recent World Health Organization goal 17 times, and only one other capital city comes close in IQAir's ranking.

Dhaka, the capital of Bangladesh, exhibited an annual average PM2.5 concentration of 80.2 micrograms per cubic meter of air, followed by Ouagadougou (Burkina Faso), Dushanbe (Tajikistan) and Baghdad (Iraq) with 46.6, 46.0 and 45.8 micrograms, respectively. The first capital city not located in Asia or Africa on the list is Sarajevo with 28.6 micrograms. IQAir's World Air Quality Report analyzed data from 7,812 air quality monitor stations and sensors, adding seven new African and four new Latin American countries to its covered area compared to its 2022 edition.

The biggest share of PM2.5, which stands for ambient particular matter with a diameter of less than 2.5 microns, stems from human activity, according to a 2021 paper published in nature communications. Emissions from road transport and the energy sector are the biggest contributors to a higher concentration of PM2.5, while smaller-scale sources like agricultural waste burning can also be a factor, especially in so-called developing countries.

Description

This chart shows the national capitals with the highest average annual PM2.5 concentration.

Download Chart
Premium statistics
Number of air quality station days in Taiwan 2023, by air quality index
Premium statistics
Most important steps to improve air quality in Poland 2024
Premium statistics
Change in air quality in the United States 2000-2022, by pollutant
Annual PM2.5 air pollution levels in Beijing, China 2013-2023
Premium statistics
Cities with highest air quality Thailand 2024
Premium statistics
Perceived confidence in the readiness of Indonesia's new capital city Nusantara 2023

Any more questions?

Get in touch with us quickly and easily.
We are happy to help!

Do you still have questions?

Feel free to contact us anytime using our contact form or visit our FAQ page.

Statista Content & Design

Need infographics, animated videos, presentations, data research or social media charts?

More Information