*Greater city areas. The release date has been set as date of site access.
Air quality categories are as follows: Good for levels of fine particulate matter that do not exceed the annual guideline value of the World Health Organization of 5 μg/m3. Fair for levels above 5 and not exceeding 10 μg/m3. Moderate for levels above 10 and not exceeding 15 μg/m3. Poor for levels above 15 and not exceeding 25 μg/m3. Very poor for levels at and above the European Union limit value of 25 μg/m3.
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Average PM2.5 concentrations in the least polluted cities in Europe 2021-2022
Faro, the capital of Portugal's Algarve region, was the least polluted city in Europe based on levels measured in 2021 and 2022. With an average PM2.5 concentration of *** micrograms per cubic meter of air (µg/m3), Faro's air quality was almost eight times cleaner than in Europe's most polluted city.
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EEA. (March 7, 2024). Average concentration of fine particles (PM2.5) in the least polluted cities in Europe from 2021 to 2022 (in micrograms per cubic meter of air) [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 24, 2026, from /statistics/1455299/least-polluted-cities-in-europe/
EEA. "Average concentration of fine particles (PM2.5) in the least polluted cities in Europe from 2021 to 2022 (in micrograms per cubic meter of air)." Chart. March 7, 2024. ÌÇÐÄÆÆ½â°æ. Accessed July 24, 2026. /statistics/1455299/least-polluted-cities-in-europe/
EEA. (2024). Average concentration of fine particles (PM2.5) in the least polluted cities in Europe from 2021 to 2022 (in micrograms per cubic meter of air). ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 24, 2026. /statistics/1455299/least-polluted-cities-in-europe/
EEA. "Average Concentration of Fine Particles (Pm2.5) in The Least Polluted Cities in Europe from 2021 to 2022 (in Micrograms per Cubic Meter of Air)." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 7 Mar 2024, /statistics/1455299/least-polluted-cities-in-europe/
EEA, Average concentration of fine particles (PM2.5) in the least polluted cities in Europe from 2021 to 2022 (in micrograms per cubic meter of air) ÌÇÐÄÆÆ½â°æ, /statistics/1455299/least-polluted-cities-in-europe/ (last visited July 24, 2026)
Average concentration of fine particles (PM2.5) in the least polluted cities in Europe from 2021 to 2022 (in micrograms per cubic meter of air) [Graph], EEA, March 7, 2024. [Online]. Available: /statistics/1455299/least-polluted-cities-in-europe/