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DIRECTIVE 2008/50/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 21 May 2008 on ambient air quality and cleaner air for Europe · European Union
Purpose | Averaging period | Threshold Information | 1 hour | 180 μg/m3 Alert | 1 hour (1) | 240 μg/m3 (1) For the implementation of Article 24, the exceedance of the threshold is to be measured or predicted for three consecutive hours.
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Source: EUR-Lex CELLAR · retrieved 2026-08-09 · Text as consolidated on 2015-09-18; changes after this date are not shown.