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Air pollution by ozone across Europe during summer 2011
Overview of exceedances of EC ozone threshold values for April–September 2011
Air pollution by ozone across Europe during summer 2012
Overview of exceedances of EC ozone threshold values for April
- September 2012
Air pollution by ozone across Europe during summer 2008
Overview of exceedances of EC ozone threshold values for April–September 2008
Twenty-sixth highest ozone 2010, based on daily running 8h max with percentage of valid measurements 75 % in μg/m3
The map shows the proximity of measured O3 concentrations to the target value set in the European Union's Air Quality Directive. At sites marked with dark orange and red dots, the daily maximum 8-hour mean O3 concentration exceeds the 120 μg/m3 threshold on more than 25 days per year (the policy target is set at max. 25 days of exceedance per year, averaged over 3 years).
Maximum ozone hole area
The ozone hole is a region of exceptionally depleted ozone in the stratosphere over the Antarctic. All figures are in million square kilometres.