Air Quality Map

What kind of air are you breathing outside right now? 

Check from our map what the air quality is where you are now. You can also check out how the air quality changes hour-by-hour in the location of your choice.  Besides the air quality index, you can also check the concentration levels of thoracic particles (PM10), fine particles (PM2.5), nitrogen dioxide (NO2) and ozone (O3). You’ll find the instructions and additional information below the map.

The air quality map is based on modelling which combines, among others, the information about air quality measurements, weather, emissions, land use and long-range transportation. The most accurate information applied to modelling concerns traffic exhausts. The emissions information on street dust and wood burning is not quite as detailed. Hence the map can sometimes rate the air quality in some locations as clearly higher or lower than it is in reality.

If you wish, you can save the air quality map as a quick link:
When using the quick link, only the air quality map becomes visible, without any texts or instructions.
If the map does not load properly, you should clear your browser cache and try again.

In addition to the new modelling of the air quality map, HSY still provides its real-time air quality map based on measurements:

How do I use and interpret the air quality map?

The air quality is presented in the air quality map using an  Air Quality Index 

  • On the right side of the air quality map there is a colour bar indicating the air quality:


  • The air quality map always opens at the current hour. By moving the white circle on the top of the air quality map, you can check what the air quality has been or what it will be in the next few hours. You can check the hourly air quality by moving 12 hours either backwards or forwards from the current hour.
  • You can also allow the sharing of your location with the air quality map. There is a location button on the right top corner of the air quality map; by clicking on it you will share your location.
  • You may view the air quality situation from further away or close up by clicking on the + or - sign on the left top corner of the air quality map. The buildings become visible when you zoom in on them. Buildings are not visible if the air quality map of the entire area is opened.
  • By clicking the valikko.JPG-sign on the right corner, you can view different types of air pollutants. A list of the air pollutants will be shown. Additionally, at the bottom there is a link to instructions where you can get more specific information about air quality map.
  • When you have selected one of the pollutants, the colour scale on the right side of the map shows the concentration's numerical value at the changing point of the colour.
  • If you place the cursor on the numerical values of the colour scale, the unit (µg/m3) of the concentration and the pollutant abbreviation (PM10, PM2.5, NO2, O3) selected on the map are both shown.
  • If you leaf through the different air pollutant maps, you will see which air pollutant is impacting most the air quality at the time in question.

The air quality of a selected target area is shown as an air quality graph from the past few hours in a pop-up window

By clicking on a location in the air quality map, an air quality pop-up window opens up. This function only works if you have zoomed so close that the buildings become visible.

  • The pop-up window shows the air quality as a graph 12 hours backwards and forwards from the current hour at the location of your choice.
  • The black vertical bar illustrates the current hour.
  • You can close the pop-up window by clicking on the tick sign (X) on the right top corner.
  • The pop-up window becomes visible only at the same zooming level where the buildings come into view. It doesn’t pop up in the map of the entire area.
  • There is no air quality presented for inside of the buildings. 
  • You can also open a pop-up window for other air pollutants (PM10, PM2.5, NO2, O3).
  • The colour scale of the pop-up window shows the numerical value of the pollutant concentration at the changing point of the colour.

We appreciate your feedback.