THIS city has worst AQI on Dec 17, not Delhi, Lahore, or Mumbai; its name is…

With a hazardous air quality index, there's a city which surpasses the AQI levels of Delhi and Kolkata. Scroll down to know the name.

Published date india.com Published: December 17, 2025 11:32 AM IST
THIS city has worst AQI on Dec 17, not Delhi, Lahore, or Mumbai; its name is...
THIS city has worst AQI on Dec 17, not Delhi, Lahore, or Mumbai; its name is...

When the Air Quality Index (AQI) is constantly increasing across some Indian cities, the data of IQAir shows that there’s a city which surpasses the AQI levels of India’s national capital region. The live data is about the most polluted cities in the world. What’s shocking is that a city located in Bosnia and Herzegovina is the most polluted one in the world. With a recorded AQI of 401, this city comes ahead of Delhi, Kolkata, and other Indian cities in terms of pollution. The name of the city is Sarajevo.

Which city has the most hazardous air in the world?

Sarajevo in Bosnia and Herzegovina has the most hazardous air in the world, as reported by IQAir. Its AQI at 11:09 local time was recorded to be 401, which was more than that of Delhi. Some air pollutants that majorly contribute to the city’s pollution include nitrogen dioxide, sulphur dioxide, and ozone.

Why is Sarajevo’s air quality poor?

The air quality of Sarajevo is poor due to multiple reasons. One of them includes a higher dependency of over 30,000 people on damp wood. Another reason is the change in its temperature, which includes lower degrees during the seasons of winter and autumn.

Other cities with high AQI

After the capital of Bosnia and Herzegovina, India’s capital city, Delhi, ranks at the number two position in the list. The data shows it has an AQI of 279. Many parts of the national capital region are blanketed with thick fog accumulation, decreasing the visibility. This leads to severe health ailments too.

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Necessary precautions to be taken in high AQI

It’s important to use an N-95 respirator while going out if the air quality index falls in the higher range. In addition, make sure of the installation of air purifiers inside the house.

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