Alert threshold

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