The study by the European Environment Agency revealed that Stockholm has the cleanest air of all European capitals.
The Nordic capitals dominated the top spots, with Reykjavik coming in second place and Helsinki in third.
Tallin, the capital of Estonia, came fourth, making it the only non-Nordic capital in the top five, with Denmark's capital Copenhagen in fifth place.
Oslo, Norway's capital city, was just outside the top five in seventh place.
At the bottom of the table the European capital with the worst air quality was Athens, with Bucharest, Nicosia in Cyprus and Croatia's Zagreb, just above.
Madrid and Rome also placed at the lower end of the table.
The Nordic countries also dominated the top spots when all European cities were included, with the top 20 cities all in Finland, Sweden, Norway or Iceland. Oulu in Finland came first, while Swedish cities Umeå, Uppsala, Örebro and Västerås were all in the top ten.
In the rating, cities are ranked from the cleanest city to the most polluted, based on the risk of mortality associated with long-term exposure to fine particulate matter, nitrogen dioxide and ozone over the past two calendar years.
You can see how clean the air is in your city by checking the agency's air quality viewer.
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