# 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, Division 1: Sulphur dioxide

Extent: E+W+S+N.I.

Health protection
Vegetation protection
Upper assessment threshold
60 % of 24-hour limit value (75 μg/m3, not to be exceeded more than 3 times in any calendar year)
60 % of winter critical level
(12 μg/m3)
Lower assessment threshold
40 % of 24-hour limit value (50 μg/m3, not to be exceeded more than three times in any calendar year)
40 % of winter critical level
(8 μg/m3)

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Source: https://www.legislation.gov.uk/eudr/2008/50/annex/II/division/A/division/1 (the official version)
Page: https://openlegislation.uk/eu-directive-2008-50/annex-II/division-A/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.