1. Sulphur dioxide

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

Health protection Vegetation protection Upper assessment threshold 60 % of 24-hour limit value (75 μg/m^(3), not to be exceeded more than 3 times in any calendar year) 60 % of winter critical level (12 μg/m^(3)) Lower assessment threshold 40 % of 24-hour limit value (50 μg/m^(3), not to be exceeded more than three times in any calendar year) 40 % of winter critical level (8 μg/m^(3))

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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as consolidated on 2015-09-18; changes after this date are not shown.