In summer 2004, the levels of ground-level ozone were high in southern Europe with widespread exceedances of the information threshold value (180 µg/m3), as laid down in the ozone directive (2002/3/EC). The exceedances of the information threshold were similar to earlier years, except for...

In summer of 2005 levels of ground-level ozone were high in southern Europe with widespread exceedances of the information threshold value (180 micro g/m3) laid down in the ozone directive (2002/3/EC). The frequency of exceedances of the information threshold was similar to earlier years, except...

Ozone levels during the summer of 2007 were among the lowest in the past decade.. The number and spatial extent of exceedances was lower than in any of the last ten summers. In contrast to the summer of 2006, no exceedances of the information threshold value (180 microgram/m3, Directive...