HSY takes care of monitoring and informing the public on air quality
HSY monitors air quality in the Helsinki Metropolitan Area. Eleven sites are used to monitor air quality in the area and two sites for the Region of Uusimaa. Air quality is assessed with the help of continuous and indicative measurements, dispersion modelling, and bioindicator monitoring. Up-to-date information on air quality is available on the map below and also by mobile phone at mobi.hsy.fi . On the map below you can navigate to the monitoring results via the symbols.
One of the cleanest metropolitan areas in Europe
The Helsinki Metropolitan Area is one of the cleanest metropolitan areas in Europe in terms of air quality. Over the past decades, progress has been made in air quality management and concentrations of sulphur dioxide, carbon monoxide and lead have decreased. Concentrations of other impurities have remained nearly unchanged or increased only slightly although the number of inhabitants, traffic volumes and energy production have increased substantially. Limit values set for nitrogen dioxide concentrations are exceeded in downtown Helsinki along the busiest streets or in street canyons.