Uusikaupunki reports an annual PM2.5 of 4.7 µg/m³. That's below the WHO 2021 annual guideline of 5 µg/m³ — cleaner than most cities on the continent.
Compared across Finland
Uusikaupunki: 4.7 µg/m³. Typical range in Finland: 4.4–5.4 µg/m³. Low anchor: Kuusamo, 3.1 µg/m³. High anchor: Helsinki, 6.6 µg/m³.
70 cities tracked