Air pollution by ozone

This page was archived on 30 Mar 2017 with reason: Content is outdated
Ozone is a 'secondary' pollutant formed from gases such as nitrogen oxides and volatile organic compounds in the presence of solar light. Ozone levels typically become particularly high in regions where considerable emissions of these gases combine with stagnant meteorological conditions, high levels of solar radiation and high temperatures during the summer. Summer refers to the period from April to September.
Summer 2014 ozone assessment

Overview of exceedances of EC ozone thresholds values for April-September 2014

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European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Phone: +45 3336 7100