Ground-level ozone

Large concentrations of ground-level ozone constitute a risk factor, for instance, for people with respiratory problems. In Finland, the information threshold set by the EU for ground-level ozone may be exceeded in summer. This happens couple of times in ten years period.

The Finnish Meteorological Institute draws up a bulletin or a warning that is read together with weather forecasts on YLE Radio Suomi if the ozone concentration in the lower atmosphere exceeds the limits determined in the relevant EU Directive.

  • The information threshold is 180 micrograms/cubic metre.
  • The alert threshold is 240 micrograms/cubic metre. It is unlikely that the alert threshold would be exceeded in Finland.

More information about air quality.

dust and ozon in the air

Photo: Sari Hartonen
 
 
 

4.9.2017