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 (NO2) measured at these sites in 2004–2019.
The data is produced annually. New monitoring locations and results are added to the map annually, after the end of the year in question. Passive sampler monitoring started in 2004.
Coordinate system of the data is ETRS-GK25.
The data can be viewed and downloaded in HSY’s open map service.