Dust from main streets

Below you can find graphs presenting the results of measurements at Lönnrotinkatu and other main streets (“Sensor measurements” tab). We monitor the concentrations of thoracic particles by sensors along main streets. You can examine the dust concentrations on main streets from different monitoring locations. The results are available as a graph or table. In the graphs, you can select one or more monitoring items that you want to view. The monitoring results are displayed hourly. You can select a day, week, or month as the reference period. The monitoring results are unverified hourly averages. Note! The results are raw data and errors have not been removed. Humidity can affect the results displayed on the sensor measurements tab which have been measured with AQT430 (Vaisala) sensors. If dust concentrations are high and air humidity is greater than 95%, the high concentrations are likely due to humidity. The measurements at Lönnrotinkatu are carried out with a more precise instrument (AQ Guard, Palas). Its results are fairly reliable and show no incorrect results caused by high humidity or mist.

More information

Sensors are a supplementary monitoring method, and the measurements are not used to monitor limit values. The sensor results are utilised, for example, in the targeting of dust control and dust binding during the street dust season.

Thoracic particles (PM10) are mainly street dust. Large, visible particles principally cause the environment to become dirty and reduce the level of comfort. Smaller, thoracic particles are not visible to the naked eye. They find their way into the trachea and bronchi and can cause health effects. The concentrations are high when the daily average exceeds the limit value level of 50 μg/m3. The air quality is poor when the hourly concentration exceeds 100 μg/m3.