Dataset - Helsinki Region Infoshare

Area where the annual limit value for nitrogen dioxide has been exceeded in the Helsinki metropolitan area

The dataset shows the areas where the annual limit value for nitrogen dioxide (40 µg/m3) has exceeded or has been in danger of exceeding. In 2022 it was estimated that the...
- WFS
- WMS
- SHP
Air quality monitoring sites and annual nitrogen dioxide (NO2) averages in the Helsinki metropolitan area

Monitoring site data includes permanent monitoring sites, mobile monitoring sites and passive samplers, as well as the annual average concentrations (μg/m3) of nitrogen dioxide...
- WFS
- WMS
- XLSX
- SHP
- TAB
Air pollutant concentrations in the Helsinki metropolitan area

Monthly and annual averages of air pollutants in the Helsinki metropolitan area, concentrations comparable to standards, maximum hourly values and data on the temporal...
- XLSX
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,...
- XLSX

You can also access this registry using the API (see API docs).