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The EU has defined an Alert threshold of 240 µg ozone per m3 air. Any exceedance of this threshold should be reported by the Member State in which it occurs to the European Commission. The threshold reflects a 'level beyond which there is a risk to human health from brief exposure for the general population'. When the threshold is exceeded, national authorities are required to inform the public and give advice. See also Information threshold.
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe's environment.
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