Air quality indices in the Helsinki metropolitan area and Uusimaa

The material contains the air quality indices of HSY’s air quality monitoring sites on an hourly basis. The air quality index divides air quality into five different classes, from good to very poor. The index classes are based on the health effects of air pollutants and on standards. When the air quality is poor, sensitive people may develop symptoms.

The material is updated four times a year (March, June, September and December).

Data and Resources

Additional information

Administrator Helsingin seudun ympäristöpalvelut HSY
Administrator's webpage
Published 24.04.2015
Updated 14.07.2023
Update frequency
More information
Data collections
Geographical coverage
Time series starts 1.1.2014
Time series accuracy
License Creative Commons Attribution 4.0
How to reference Source: Air quality indices in the Helsinki metropolitan area and Uusimaa. The maintainer of the dataset is Helsingin seudun ympäristöpalvelut HSY. The dataset has been downloaded from Helsinki Region Infoshare service on 26.09.2023 under the license Creative Commons Attribution 4.0.
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