Helsinki Air Quality
Finland · 60.17, 24.94 · hour of 2026-10-06 22:00 UTC
28US AQI
GoodCategory
1.4PM2.5 (µg/m³)
2.8PM10 (µg/m³)
56O3 (µg/m³)
2.6NO2 (µg/m³)
0.3SO2 (µg/m³)
163CO (µg/m³)
What this means
Helsinki currently ranks #50 of 50 tracked cities for PM2.5 (1 = most polluted). Its PM2.5 level of 1.4 µg/m³ is within the WHO 24-hour guideline of 15 µg/m³. A US AQI of 28 falls in the “Good” band; see the health guide for what each band means.
Figures are hourly values from the Open-Meteo Air Quality API, modelled from Copernicus CAMS forecasts for the city-centre coordinates rather than read from a single ground station. Concentrations are in micrograms per cubic metre; the US AQI follows EPA breakpoints and reports the worst pollutant. Data is cached for 15 minutes.